Diem Quynh Pham, D.O.
Procedural Dermatology Physician · Chino Hills, CA
Diem Quynh Pham, D.O. is a procedural dermatology physician with a practice address in Chino Hills, California, and NPI 1255421335, issued on Oct 13, 2006. Check the license (California 20A7309, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Diem Quynh Pham
- Credential
- D.O.
- Primary taxonomy
- Procedural Dermatology Physician 207NS0135X
- License number
- 20A7309 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3110 Chino Ave Ste 120, Chino Hills, CA 91709
- Phone
- (909) 313-5111
- Enumerated
- Oct 13, 2006
- Record last updated
- May 13, 2026
- Medicare enrollment
- Enrolled (PECOS I20061220000525); accepts Medicare assignment
- Medical or professional school
- College Of Osteo Med Of The Pacific At Pomona, 1997
- Entity
- Type 1 · individual
8 nearest procedural dermatology physician records → All 120 in California → Look up another NPI →
Also registered at 3110 Chino Ave Ste 120
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lauren DuffyFamily Nurse Practitioner1952005498
Verify Diem Quynh Pham in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A7309Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% fewer Medicare Part D claims than the average procedural dermatology physician in 2024
471 Medicare Part D claims for 138 beneficiaries, against an average of 713 among the 446 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Clobetasol Propionate61 claims
- Ketoconazole56 claims
- Mupirocin49 claims
- Triamcinolone Acetonide41 claims
- Alclometasone Dipropionate27 claims
- Prednisone20 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 89.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,605.28
87 payments; by number, the most common kind was food and beverage; the largest payer was Leo Pharma Inc. The 377 providers of this specialty with any payment received $10,439.11 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Sand Dermatology PCChino Hills, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Diem Quynh Pham among 120 procedural dermatology physician records in California
Diem Quynh Pham, D.O. is one of 120 procedural dermatology physician records with a practice address in California. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 14% of them.
- NPI issued2006 · 14% of these records are older, 40% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated1997 · median 1993 among the 62 with a school on file
- Record last updated2026 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207NS0135X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Procedural Dermatology Physician providers in California
There are 120 procedural dermatology physician records in California.
All 120 in California → Every provider in Chino Hills → Procedural Dermatology Physician nationwide →
The 8 procedural dermatology physician records with the nearest ZIP codes
- Jacob Rispler, M.D.Covina, CA 917231689660037
- Ronald Liskanich, D.O.Upland, CA 917861245391820
- Tan Nguyen, M.D.Upland, CA 917861144273491
- Andrea Passalacqua, DOUpland, CA 917861134380330
- Gloria Stevens, M.D.Upland, CA 917861699836288
- Charles Tran, D.O.Upland, CA 917861922051739
- Peter Rullan, M.D.Chula Vista, CA 919101114963170
- Sam Khalifian, MDLa Mesa, CA 919421174926190
Common questions
What is Diem Quynh Pham, D.O.'s NPI number?
Diem Quynh Pham, D.O.'s National Provider Identifier (NPI) is 1255421335, issued on Oct 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Diem Quynh Pham, D.O. located?
The NPPES record lists a practice address at 3110 Chino Ave Ste 120, Chino Hills, CA, 91709. Phone: (909) 313-5111. Providers update this record themselves, so call before visiting.
How can I verify Diem Quynh Pham, D.O.'s license?
NPPES lists California license number 20A7309, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Diem Quynh Pham, D.O. prescribe under Medicare Part D?
In 2024, Diem Quynh Pham, D.O. had 471 Medicare Part D claims for 138 beneficiaries; the average among procedural dermatology physician prescribers was 713. Part D covers Medicare prescriptions only.
What is Diem Quynh Pham, D.O.'s MIPS final score?
The 2023 MIPS final score is 89.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.