Maria Andrae-Hammond, M.D.
NPI 1942579115ActiveIndividual· Internal Medicine· Orinda, CA
Internal Medicine (M.D.) with John Muir Physician Network, practicing in Orinda, California. Their prescriptions cost Medicare Part D more than their services did: $246,963 for 4,116 claims, against $80,619 paid for services in 2024. Lilly USA, LLC was the largest of 3 companies reporting payments in 2025, $103.32 in all, mostly food and beverage. Lists Alta Bates Summit Medical Center and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1942579115 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Dec 17, 2011 |
| Last updated in NPPES | Mar 8, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A118226 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 408 |
|---|---|
| Services billed | 1,560 across 31 procedure codes |
| Paid by Medicare | $80,619 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,116 · 10,542 30-day fills |
|---|---|
| Patients | 474 |
| Total drug cost | $246,963 |
| Generic share | 92% of claims |
Education and affiliations
| Graduation year | 2007 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- John Muir Physician NetworkPleasant Hill, CA · 494 clinicians
Hospital affiliations
- Alta Bates Summit Medical CenterOakland, CA
- Alta Bates Summit Medical Center - Alta Bates CampBerkeley, CA
- John Muir Medical Center - Concord CampusConcord, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
- UCSF Medical CenterSan Francisco, CA
Other facilities
- Ace Home Health Care & Hospice, IncHome health agency · Orinda, CA
- John Muir Home Health ServicesHome health agency · Concord, CA
- One Health Home Care, IncHome health agency · Livermore, CA
Industry payments (Open Payments)
- 2025$103.32 · 4 payments from 3 companies
- 2024$79.30 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $59.26 | 2 |
| Pfizer Inc. | $27.15 | 1 |
| Merck Sharp & Dohme LLC | $16.91 | 1 |
What the 2025 payments were for
- Food and Beverage$103.32 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 26 internal medicine physicians in Orinda · All internal medicine physicians in California