Anne Maria Grzegorczyk, M.D.
NPI 1720434004ActiveIndividual· Internal Medicine, Pulmonary Disease· Walnut Creek, CA
Internal Medicine, Pulmonary Disease (M.D.) with Muir Pulmonary Critical Care, practicing in Walnut Creek, California. In 2024 Medicare paid $173,855 for 485 patients, and Part D covered 333 of their prescriptions, 64% of them generic. Boehringer Ingelheim Pharmaceuticals, Inc. was the largest of 7 companies reporting payments in 2025, $543.87 in all, mostly food and beverage. Lists John Muir Medical Center - Concord Campus and 1 other hospital as hospital affiliations.
Overview
| NPI | 1720434004 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 5, 2016 |
| Last updated in NPPES | Apr 22, 2024 |
| Certified by provider | Apr 22, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | A154982 | CA |
| Internal Medicine, Critical Care Medicine | 207RC0200X | A154982 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Pulmonary Disease (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 485 |
|---|---|
| Services billed | 1,603 across 54 procedure codes |
| Paid by Medicare | $173,855 |
Part D prescriptions in 2024
| Prescriptions (claims) | 333 · 429 30-day fills |
|---|---|
| Patients | 81 |
| Total drug cost | $116,344 |
| Generic share | 64% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Pulmonary Disease |
| Secondary specialties | Critical Care (Intensivists) |
| Telehealth | Offers telehealth |
Medical group
- Muir Pulmonary Critical CareWalnut Creek, CA · 13 clinicians
Hospital affiliations
- John Muir Medical Center - Concord CampusConcord, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
Industry payments (Open Payments)
- 2025$543.87 · 10 payments from 7 companies
- 2024$706.36 · 11 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. | $371.67 | 3 |
| Medtronic, Inc. | $56.81 | 1 |
| Merck Sharp & Dohme LLC | $31.97 | 1 |
| Abbvie Inc. | $25.68 | 1 |
| Amgen Inc. | $25.40 | 1 |
What the 2025 payments were for
- Food and Beverage$543.87 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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