2026 data CMS NPPES NUCC Taxonomy

Doctors in Pasadena, CA

Compiled from official public sources by the PlainDoctor editorial team.

Active healthcare providers in Pasadena sourced from the CMS NPPES weekly file, no proprietary ratings, no editorial scores. NPI counts, specialty distribution, and primary practice addresses refreshed each release.

10,326
Providers
CMS NPPES-registered
20
Specialties
NUCC taxonomy codes
Behavior Technician
Top specialty
1,637 providers
California
State
CA

10,326 healthcare providers across 20 specialties

Pasadena, California appears in the CMS National Plan and Provider Enumeration System with 10,326 registered healthcare providers spanning 20 distinct NUCC-taxonomy specialties. This count includes every individual clinician who has applied for an NPI and listed a practice address in Pasadena - physicians, dentists, nurse practitioners, physician assistants, chiropractors, physical therapists, optometrists, psychologists, podiatrists, and every other credentialed provider type CMS tracks. It does not measure hospital beds, urgent-care capacity, or whether a given clinic is accepting new patients; it measures the pool of professionals with current NPI enrollment and a Pasadena practice location on file. Every figure is drawn from the federal National Provider Identifier Registry (CMS NPPES) - more than 7 million providers, maintained since May 2007, with 2023 Medicare Part D data, and, according to CMS, can be searched, compared, and traced in our methodology.

The provider mix in Pasadena is weighted toward Behavior Technician (1,637 clinicians, followed by Rehabilitation Practitioner with 938 and Marriage & Family Therapist with 937). That distribution reflects how NPPES records specialty: providers self-select a primary taxonomy code, so a family physician who also practices geriatrics will show up under whichever NUCC code they registered first. Relative to California's population, Pasadena reports roughly 26.5 providers per 100,000 residents using the state-level denominator, which is a rough proxy rather than a precise access-to-care measurement; the true catchment area of any {cityName} clinician extends beyond the municipal boundary.

Within California, Pasadena ranks #13 of 805 cities tracked by provider count, accounting for 1.1% of the state's registered providers. Of California's most common specialties, General Practice Dentistry is the most prominent one with no provider currently listing a Pasadena practice address, a coverage gap Pasadena patients typically fill by traveling to a larger nearby hub.

For Pasadena patients, this directory is most useful as a starting shortlist, searching by specialty narrows the 690-taxonomy roster to clinicians with the relevant training, and each provider page links to NPI, state licensing boards, and the NPPES registry for credential verification. Important: PlainDoctor is a directory of publicly available CMS government data, not a review site, a ranking, or medical advice. NPPES data is self-reported and refreshed monthly, so listing details may be out of date; call the practice directly to confirm the provider is still there, accepts your insurance, and is taking new patients. Nothing on this page substitutes for consulting a licensed clinician about your personal health decisions.

10,326
Providers
20
Specialties
#13
of 805 CA cities
1.1%
of CA providers
26.5
Per 100K (state)

Which specialties are most common in Pasadena

Behavior Technician 1,637
Rehabilitation Practitioner 938
Marriage & Family Therapist 937
Student in an Organized Health Care Education/Training Program 781
Clinical Social Worker 414
Addiction (Substance Use Disorder) Counselor 396
Mental Health Counselor 384
Case Manager/Care Coordinator 383
Clinical Psychologist 263
Behavior Analyst 198
Pharmacist 177
Physical Therapist 176
Internal Medicine Physician 169
Licensed Vocational Nurse 150
Psychologist 127
Acupuncturist 121
Social Worker 119
Community Health Worker 108
Family Nurse Practitioner 100
Chiropractor 99

Healthcare Providers (Page 46)

Name
Dayanira Diaz
Mental Health Counselor
Desiree Diaz
Behavior Analyst
Eliza Diaz
Rehabilitation Practitioner
Erica Diaz
Case Manager/Care Coordinator
Inez Diaz
Addiction (Substance Use Disorder) Counselor
Jasminelynn Diaz
Behavior Technician
Javier Diaz
Clinical Social Worker
Jorge Diaz
Day Training/Habilitation Specialist
Krystal Diaz
Mental Health Counselor
Luis Diaz
Behavior Analyst
Maria Diaz
Marriage & Family Therapist
Maria Diaz
Behavior Technician
Michelle Diaz, LCSW
Clinical Social Worker
Patricia Diaz, IMF
Marriage & Family Therapist
Robert Diaz, LCSW
Clinical Social Worker
Roxana Diaz
Behavior Technician
Sergio Diaz
Addiction (Substance Use Disorder) Counselor
Valerie Diaz
Behavior Technician
Marcela Diaz-Smoire, LMFTI
Marriage & Family Therapist
Steven Dice
Behavior Technician
Alexandra Dickerson
Behavior Technician
Darlene Dickie, AMFT
Marriage & Family Therapist
Deanna Dickson, DOCTOR OF CHIROPRACT
Chiropractor
Laura Dickson, LCSW
Clinical Social Worker
Richard Diehl, M.D.
Orthopaedic Surgery Physician
Vivian Diep, L.AC.
Acupuncturist
Todd Dietrick, M.D.
Orthopaedic Surgery Physician
William Dietrick, MD
Specialist
Gina Digiovanni, N.P.
Adult Health Nurse Practitioner
Hildy Dimarzio, PSY.D., LCSW
Psychoanalyst
Giancarlo Dimassa, MD
Obesity Medicine (Preventive Medicine) Physician
Luis Dimen, M.D.
Pulmonary Disease Physician
Lesley Anne Dimson, COTA/L
Occupational Therapy Assistant
Paul Dinh, P.T.
Physical Therapist
America Dinsmore, LMFT
Marriage & Family Therapist
Caroline Dionisio
Behavior Technician
Lauren Diramerian, LCSW
Clinical Social Worker
Chelsea Director, DMD
Dentist
William Discepolo, M.D.
Internal Medicine Physician
Theodora Ditommaso
Behavior Technician
Sheila Dittler
Social Worker
James Ditton
Addiction (Substance Use Disorder) Counselor
Lauryn Divers, LMFT
Marriage & Family Therapist
Anita Dixon
Behavior Technician
Esmeralda Dixon
Behavior Technician
Tameshia Dixon
Student in an Organized Health Care Education/Training Program
Christian Dizon, PT, D.P.T.
Physical Therapist
Courtny Dizon
Behavior Technician
Holliston Dizon, LCSW
Clinical Social Worker
Lucy Dizon
Behavior Technician

Nearby Cities in California

Other California cities with provider coverage in the CMS NPPES registry.

Compare specialties side-by-side →

Frequently Asked Questions

How many doctors are in Pasadena, CA?
There are 10,326 registered healthcare providers in Pasadena, CA, covering 20 specialties. This includes physicians, dentists, therapists, and other licensed providers.
What are the most common medical specialties in Pasadena?
The most common specialties in Pasadena are Behavior Technician, Rehabilitation Practitioner, Marriage & Family Therapist, Student in an Organized Health Care Education/Training Program, Clinical Social Worker. Behavior Technician has the most providers with 1,637.

Provider data from CMS NPPES (download.cms.gov/nppes); specialty classification from NUCC Health Care Provider Taxonomy. PlainDoctor does not rate or rank providers. Methodology · About

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from CMS National Plan and Provider Enumeration System (NPPES). Consult a qualified professional before making decisions based on this data.

Compiled from official public sources by the PlainDoctor editorial team.