Doctor profile · Federal record
Dr. Diane Mar, MD
Rheumatology Physician (CMS: Rheumatology) · Internal Medicine Physician · Stanford, CA
- NPI 1356704795
- Accepts Medicare
- MIPS 75.5 / 100 · 2023
- 10 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 3 locations .
- Primary practice
-
300 Pasteur Dr
Stanford, CA 943052200
(650) 723-4000 - Additional location
-
1000 Welch RD Ste 203
Palo Alto, CA 943041808
(999) 999-9999 - Additional location
-
900 Blake Wilbur Dr
Palo Alto, CA 943042201
(650) 723-6961
Credentials & registration
- NPI registered
- April 2016 — 10 yrs on file
- Profile last updated
- April 15, 2024
- Year of graduation
- 2016 — 10 yrs since
- Specialty taxonomy
- 207RR0500X — NUCC code
- State license (1)
- California #A161922
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1356704795. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
114
Distinct HCPCS
2
Medicare allowed
$12,202
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 96 | 58 | $113 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 18 | 17 | $76 |
In context: peer comparison
Among 9 peers in this city , average services per provider: 105. This provider delivers 1.1× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
172
Patients
21
Total drug cost
$92,841
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Prednisone | Generic | 60 | 21 | $761 |
| Hydroxychloroquine Sulfate | Generic | 32 | 0 | $2,134 |
| Allopurinol | Generic | 31 | 0 | $577 |
| Methotrexate (Methotrexate Sodium) | Brand | 21 | 0 | $880 |
| Leflunomide | Generic | 16 | 0 | $2,491 |
| Rinvoq (Upadacitinib) | Brand | 12 | 0 | $85,997 |
Frequently asked questions
What is Dr. Diane Mar's medical specialty?
Dr. Diane Mar practices Rheumatology Physician in Stanford, CA.
Where does Dr. Diane Mar practice?
Dr. Diane Mar practices at 300 Pasteur Dr, Stanford, CA 943052200. Office phone: 6507234000.
What is Dr. Diane Mar's NPI?
Dr. Diane Mar's National Provider Identifier (NPI) is 1356704795, issued by NPPES.
Does Dr. Diane Mar accept Medicare assignment?
Yes. Dr. Diane Mar accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Diane Mar commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.