Doctor profile · Federal record
Dr. Michael Greenfield, M.D.
Endocrinology, Diabetes & Metabolism Physician (CMS: Endocrinology) · Mountain View, CA
- NPI 1295873685
- MIPS 74.2 / 100 · 2023
- 52 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
2500 Hospital Dr, Building 14
Mountain View, CA 940404106
(650) 965-7500
Credentials & registration
- NPI registered
- February 2007 — 19 yrs on file
- Profile last updated
- July 8, 2007
- Year of graduation
- 1974 — 52 yrs since
- Specialty taxonomy
- 207RE0101X — NUCC code
- State license (1)
- California #G35253
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1295873685. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
756
Distinct HCPCS
5
Medicare allowed
$105,815
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 683 | 215 | $144 | |
82962 |
Blood glucose (sugar) test performed by hand-held instrument | 22 | 21 | $3 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 20 | 20 | $236 | |
83036 |
Hemoglobin a1c level | 18 | 17 | $10 | |
95250 |
Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with provider supplied equipment | 13 | 13 | $178 |
In context: peer comparison
Among 4 peers in Mountain View Endocrinology, Diabetes & Metabolism Physician, average services per provider: 213. This provider delivers 3.5× the peer median.Open Payments
Industry payments received
All-time total
$100
Transactions
6
Manufacturers
3
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbott Laboratories | 3 | $53.60 | |
| Abbvie INC. | 2 | $33.00 | |
| Xeris Pharmaceuticals, INC. | 1 | $13.36 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,525
Patients
384
Total drug cost
$677,053
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Rosuvastatin Calcium | Generic | 209 | 63 | $4,151 |
| Levothyroxine Sodium | Generic | 161 | 43 | $2,744 |
| Jardiance (Empagliflozin) | Brand | 158 | 42 | $209,311 |
| Metformin Hcl | Generic | 147 | 40 | $2,527 |
| Metformin Hcl ER (Metformin Hcl) | Brand | 133 | 42 | $2,232 |
| Synthroid (Levothyroxine Sodium) | Brand | 127 | 29 | $15,260 |
| Ozempic (Semaglutide) | Brand | 113 | 22 | $218,763 |
| Atorvastatin Calcium | Generic | 109 | 27 | $1,432 |
| Losartan Potassium | Generic | 94 | 27 | $1,173 |
| Nano 2Nd Gen Pen Needle (Pen Needle, Diabetic) | Brand | 51 | 13 | $5,136 |
Frequently asked questions
What is Dr. Michael Greenfield's medical specialty?
Dr. Michael Greenfield practices Endocrinology, Diabetes & Metabolism Physician in Mountain View, CA.
Where does Dr. Michael Greenfield practice?
Dr. Michael Greenfield practices at 2500 Hospital Dr, Mountain View, CA 940404106. Office phone: 6509657500.
What is Dr. Michael Greenfield's NPI?
Dr. Michael Greenfield's National Provider Identifier (NPI) is 1295873685, issued by NPPES.
Does Dr. Michael Greenfield accept Medicare assignment?
Dr. Michael Greenfield does not accept Medicare assignment for all services. Patients may be billed amounts beyond Medicare-allowed charges.
What procedures does Dr. Michael Greenfield commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Blood glucose (sugar) test performed by hand-held instrument (HCPCS 82962); New patient office or other outpatient visit (HCPCS 99205). Source: CMS Medicare Physician & Other Practitioners file.