Doctor profile · Federal record
Dr. Iris Ma
Internal Medicine Physician (CMS: Internal Medicine) · Stanford, CA
- NPI 1598055766
- Accepts Medicare
- MIPS 87.4 / 100 · 2023
- 16 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
300 Pasteur Dr
Stanford, CA 943052200
(650) 723-4000 - Mailing address
-
1804 Embarcadero RD, Ste 100
Palo Alto, CA 943033341
Credentials & registration
- NPI registered
- April 2011 — 15 yrs on file
- Profile last updated
- September 20, 2016
- Year of graduation
- 2010 — 16 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #A122086
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1598055766. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
955
Distinct HCPCS
6
Medicare allowed
$128,318
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 603 | 212 | $132 | |
99239 |
Hospital discharge day management, more than 30 minutes | 141 | 139 | $129 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 79 | 78 | $193 | |
G0180 |
Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and | 55 | 50 | $63 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 44 | 19 | $88 | |
99291 |
Critical care, first 30-74 minutes | 33 | 18 | $232 |
In context: peer comparison
Among 95 peers in Stanford Internal Medicine Physician, average services per provider: 85. This provider delivers 11× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
42
Patients
37
Total drug cost
$9,190
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Eliquis (Apixaban) | Brand | 16 | 12 | $8,902 |
| Pantoprazole Sodium | Generic | 14 | 13 | $209 |
| Oxycodone Hcl | Generic | 12 | 12 | $79 |
Frequently asked questions
What is Dr. Iris Ma's medical specialty?
Dr. Iris Ma practices Internal Medicine Physician in Stanford, CA.
Where does Dr. Iris Ma practice?
Dr. Iris Ma practices at 300 Pasteur Dr, Stanford, CA 943052200. Office phone: 6507234000.
What is Dr. Iris Ma's NPI?
Dr. Iris Ma's National Provider Identifier (NPI) is 1598055766, issued by NPPES.
Does Dr. Iris Ma accept Medicare assignment?
Yes. Dr. Iris Ma accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Iris Ma commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Hospital discharge day management (HCPCS 99239); Initial hospital care with moderate level of medical decision making (HCPCS 99223). Source: CMS Medicare Physician & Other Practitioners file.