Physician Profile
Diem Q. Pham, D.O.
Unclaimed ProfileAbout Dr. Pham
Diem Q. Pham, D.O. is a healthcare provider in Chino Hills, CA specializing in mohs surgery / dermatologic surgery. Diem trained at College of Osteo Med of the Pacific at Pomona, graduating in 1997. Medicare claims data shows Diem provided 1,716 services to 613 patients. The services billed most often include destruction of precancer skin growth, 2-14 growths, established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, and injection, triamcinolone acetonide, not otherwise specified, 10 mg.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (909) 313-5111
- Email not available
Practice Locations
3110 CHINO AVE STE 120
Chino Hills, CA 91709
954 W Foothill Blvd Ste B
Upland, CA 91786
Procedures Most Often Billed to Medicare
1,716 services · 613 patients · 13 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Destruction of precancer skin growth, 2-14 growths | Procedure | 17003 |
534 | As often as other peers in Mohs Surgery / Dermatologic… |
| Destruction of skin growth, 1-14 growths | Procedure | 17110 |
163 | As often as other peers in Mohs Surgery / Dermatologic… |
| Destruction of precancer skin growth, 1 growth | Procedure | 17000 |
102 | Less often than most peers in Mohs Surgery / Dermatologic… |
| Destruction of precancer skin growth, 15 or more growths | Procedure | 17004 |
94 | More often than most peers in Mohs Surgery / Dermatologic… |
| Destruction of skin growth, 15 or more growths | Procedure | 17111 |
58 | More often than most peers in Mohs Surgery / Dermatologic… |
| Shaving of skin growth of body, arms, or legs, 0.6-1.0 cm | Procedure | 11301 |
33 | As often as other peers in Mohs Surgery / Dermatologic… |
| Shaving of skin growth of body, arms, or legs, 0.5 cm or less | Procedure | 11300 |
22 | As often as other peers in Mohs Surgery / Dermatologic… |
| Injection into skin growth, 1-7 growths | Procedure | 11900 |
19 | Less often than most peers in Mohs Surgery / Dermatologic… |
| Injection, triamcinolone acetonide, not otherwise specified, 10 mg | Drug given | J3301 |
246 | More often than most peers in Mohs Surgery / Dermatologic… |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
355 | As often as other peers in Mohs Surgery / Dermatologic… |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Class of 1997 at College of Osteo Med of the Pacific at Pomona 8
Providers who graduated from the same medical school in the same year.
Also performs Destruction of precancer skin growth, 2-14 growths 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Diem Q. Pham specialize in?
Diem Q. Pham is a mohs surgery / dermatologic surgeon in Chino Hills, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Mohs Surgery / Dermatologic Surgery”.
NPI registry
Where is Diem Q. Pham located?
Diem Q. Pham is listed at 3110 Chino Ave Ste 120, Chino Hills, CA 91709. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Diem Q. Pham's phone number?
The number on file is (909) 313-5111. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Diem Q. Pham?
Diem Q. Pham's National Provider Identifier is 1255421335. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Diem Q. Pham train?
Diem Q. Pham attended College of Osteo Med of the Pacific at Pomona, graduating in 1997. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Diem Q. Pham have?
Diem Q. Pham has 29 years experience. Calculated from a graduation year of 1997, reported in the CMS National Downloadable File.
CMS public data
What does Diem Q. Pham do most often?
According to Medicare billing data, Diem Q. Pham performs procedures including destruction of precancer skin growth, 2-14 growths, destruction of skin growth, 1-14 growths and destruction of precancer skin growth, 1 growth, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Diem Q. Pham's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Diem Q. Pham. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.