The PDM-3: a clinician's guide to the Psychodynamic Diagnostic Manual

Most clinicians keep a second drawer. The official diagnosis goes in the chart, and the richer picture of the person — how they hold together, what they do with feeling, what their symptoms are for — lives somewhere less official. The Psychodynamic Diagnostic Manual is an attempt to give the second drawer a shared vocabulary. Its third edition, the PDM-3, was published on January 6, 2026 by Guilford Press, edited by Vittorio Lingiardi and Nancy McWilliams. It is a substantial revision rather than a touch-up: roughly seventy percent of the content is new.

What the PDM-3 actually is

The PDM-3 is a diagnostic framework that describes people along three dimensions: the overall organization of their personality, the specific mental capacities available to them, and the way they subjectively experience their symptoms. It is descriptive and empirically anchored, but it is built on psychodynamic assumptions that the DSM lacks, mainly that symptoms are meaningful and that the person underneath them can be characterized systematically. In other words, the DSM tells you what a person has while the PDM tries to tell you who it is that has it, what they have to work with and why.

It is a large reference volume rather than a codebook, and nobody reads it front to back. In practice you look up the profile you need, the way you would use a differential diagnosis text.

What is new in the third edition

The most notable change to the PDM-3 is to how it was structured. Earlier editions treated adulthood as the default and appended sections for other ages. Lingiardi and McWilliams did away with that and organized the PDM-3 by developmental chronology. It runs the lifespan in order: infancy and early childhood, childhood, adolescence, adulthood, and later life. Each developmental stage gets its own full axial treatment.

The reorganization proves to be quite practical because it considers what a given phenomenon means at different developmental stages. For example, identity diffusion (an unstable sense of self) in a fifteen-year-old is not the same as identity diffusion in a forty-five-year-old. The developmental frame makes the distinctions structural rather than optional.

Furthermore, the PDM-3 has been updated to incorporate a decade of research that did not exist when the PDM-2 was assembled, particularly in attachment, mentalization, and the empirical personality-disorder literature. It also adopted a multicultural lens by taking seriously the question of what the manual looks like outside the North American and Western European contexts that shaped its first two editions.

The three axes: P, M, and S

Each developmental section uses the same multiaxial structure that consists of three axes.

The P axis: personality patterns and syndromes. This axis asks two questions in sequence. First, at what level is this person organized? The PDM uses a continuum running from healthy through neurotic and borderline to psychotic, with the borderline range typically split into higher and lower bands because the clinical difference between them is fairly significant. For a more in-depth explanation, check out our post on levels of personality organization.

Second, what is the characteristic style? These are the familiar character organizations: depressive, narcissistic, schizoid, paranoid, obsessive-compulsive, hysteric-histrionic, etc. McWilliams frames the two questions as how much and what kind, and the P axis preserves that pairing.

The M axis: profile of mental functioning. This is the axis with no real equivalent in the DSM, and for treatment planning it is the most useful of the three. Rather than asking what the person is like in general, it rates a set of specific capacities, each on its own gradient.

Among them are:

• regulation of attention and learning
• the range and communication of affect
• mentalization (the capacity to reflect on your own internal states and considers others’ feelings and perspectives)
• differentiation and integration of identity
• capacity for relationships and intimacy
• self-esteem regulation
• impulse control
• the maturity and flexibility of defensive functioning
• self-observation (the ability to examine your own thought processes)
• internal standards and ideals
• capacity to construct meaning

The capacities are grouped into broader domains and can be summed into an overall index, though the profile is more informative than the total. The value of rating capacities separately allows for additional nuance and consideration of individual differences. A patient can have excellent affect tolerance and almost no self-observation. Another can mentalize beautifully about colleagues and not at all about a spouse. A one-dimensional approach flattens exactly the information you need in order to have a more comprehensive understanding of the individual.

The S axis: symptom patterns and subjective experience. This axis covers the territory the DSM covers, but also provides insight into how symptoms from a specific diagnosis can manifest differently in different people. For example, someone with a panic disorder diagnosis may experience panic attacks as a physiological dysfunction that needs to be fixed. Another person may experience panic attacks as evidence that she is losing her mind. The approach to treatment for the individuals would be different in order to be effective. Same diagnosis, different treatment.

The PDM-3 in clinical practice

The PDM-3 was designed as a complement to the DSM-5-TR and ICD-11, not a replacement. It carries no billing codes and makes no claim to the administrative functions those systems perform.

What does this look like in practice? The DSM or ICD diagnosis goes on the insurance claim, the treatment plan, and other clinical documentation as needed, because those are systems that require a shared shorthand and legitimately benefit from one. The PDM formulation goes into how you actually work: what you interpret and what you leave alone for another year, how much structure the frame needs, how active you should be with a patient, and what you expect to happen between you and the patient as the therapeutic relationship develops.

Allow me to illustrate with an example:

Bernice is a 35-year-old marketing director for a growing company. She started therapy with Dr. Dane to address her frequent panic attacks and trouble sleeping due to racing thoughts. She frequently worries that she is failing at her job and that her friends and coworkers secretly dislike her. Bernice grew up with critical parents who only praised her when she achieved top marks. She learned early that her worth depended entirely on perfection. Bernice frequently shows up to therapy speaking very quickly, making it difficult for Dr. Dane to interject. She shows up to therapy as if she is being evaluated for how well she executed the interventions discussed in the previous session and is apologetic if she talks about an issue that they had already discussed in the past. Bernice’s fears of disappointing or annoying Dr. Dane is a frequent theme they process together.

Dr. Dane is in-network with Bernice’s insurance, and uses the ICD-11 diagnosis and the DSM-5-TR diagnosis for her documentation in order for insurance to cover services. Bernice is diagnosed with Generalized Anxiety Disorder and Panic Disorder. From a symptom reduction standpoint, Bernice’s treatment plan consisted of utilizing evidence-based interventions such as utilizing CBT to address negative thought patterns, behavioral/somatic interventions to help decrease Bernice’s physical symptoms and to help improve sleep, as well as mindfulness practices to help ground herself when dealing with racing thoughts.

After the first few sessions, Dr. Dane used the PDM to develop a better clinical understanding of Bernice to personalize his treatment approach.

P-Axis: Personality Organization and Style

• Level of Personality Organization: Neurotic level. Bernice has a stable sense of identity, tests reality accurately, and maintains good professional functioning, though she is rigid under stress.
• Personality Style/Pattern: Depressive / Self-Critical style. Her core conflict centers on guilt, fear of abandonment, and deep self-blame and self-criticism.

M-Axis: Mental Functioning

• Capacities Evaluated: The PDM-3 assesses 13 distinct mental capacities on a 5-point scale.
• Affect Regulation: Moderately impaired. She struggles to soothe herself when she feels rejected or criticized.
• Identity and Relationships: Mildly impaired. She knows who she is, but her internal view of relationships assumes others will eventually judge or reject her.
• Self-Reflective Functioning (Mentalization): Intact. She can step back and recognize that her fears of rejection might be exaggerated, even if she still feels them intensely.

S-Axis: Symptom Patterns and Subjective Experience

• Descriptive Diagnosis (compatible with DSM/ICD): Generalized anxiety and panic disorder.
• Subjective Meaning: Her panic attacks are not random. They happen when she feels overwhelmed by unexpressed anger toward demanding colleagues and her internal pressure to be perfect. Her anxiety serves as an alarm system against experiencing forbidden aggressive or dependent feelings.

With this in mind, in addition to providing coping skills, Dr. Dane starts digging deeper into Bernice’s underlying self-critical beliefs by focusing on how Bernice treats herself like her critical parents did. He tracks how often Bernice attacks herself during sessions and addresses how she speaks about her failures rather than just resolving the panic attacks. Dr. Dane also gently highlights Bernice’s tendency to be the “perfect patient” by arriving early, never missing appointments, and reporting “good progress” to please the therapist. In order to help increase her panic threshold, Dr. Dane helps Bernice notice the exact moments during sessions when her anxiety rises (e.g., when mentioning a disagreement with her boss), linking her physical symptoms to hidden, unexpressed emotions.

The Psychodiagnostic Chart

The Psychodiagnostic Chart is a one-page clinician-rated form that walks you through all three axes: level of personality organization, the M-axis capacities with their rating anchors, the predominant personality style, and the symptom picture with a note on subjective experience. There are different versions for each developmental band.

It takes a few minutes once you know the axes, it is free, and it converts the PDM from a book you agree with into a procedure you perform. For supervision it is particularly useful, since it makes a trainee’s implicit formulation explicit enough to discuss. If you are going to adopt one piece of this framework, adopt this one.

The convergence of the PDM-3, DSM Alternative Model, and ICD-11

For decades the psychodynamic account of personality and the official nosologies were doing different things in incompatible languages. Then the DSM-5 included an Alternative Model for Personality Disorders in its emerging-measures section. The AMPD rates personality on two criteria: level of personality functioning, assessed through identity, self-direction, empathy, and intimacy, and then a set of pathological trait domains. Read that first criterion again. It is a dimensional severity judgment built on identity coherence and the quality of object relations, which is very close to what Otto Kernberg has been describing since the mid-1970s and what the P axis rates.

The ICD-11 went further and made the change official rather than alternative. It retired the categorical personality disorder types almost entirely and replaced them with a severity rating plus trait qualifiers. To diagnose a personality disorder under ICD-11 you must first say how severe the disturbance of self-functioning and interpersonal functioning is.

So the mainstream systems have arrived, by an empirical route and with different vocabulary, at a structural claim psychoanalysis made on clinical grounds: severity of personality organization is the primary axis, and type is secondary. The PDM-3 engages this convergence directly rather than treating it as a coincidence, and its crosswalks to AMPD and ICD-11 concepts are among the more practically useful additions in the January 2026 edition.

For the wider framework these manuals sit inside, see Understanding psychoanalytic diagnosis. For a worked example of a single character style, see the depressive personality.

This post is part of Undercurrent, CTG’s blog series on psychoanalytic diagnosis, personality structures, and how therapy works.