Doctor profile · Federal record
Dr. Maciej Ossowski, M. D.
Family Medicine Physician (CMS: Family Practice) · Merced, CA
- NPI 1346207883
- 53 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
3349 G St Ste D, Suite D
Merced, CA 953400978
(209) 722-8040
fax (209) 722-0287
Credentials & registration
- NPI registered
- April 2006 — 20 yrs on file
- Profile last updated
- July 19, 2012
- Year of graduation
- 1973 — 53 yrs since
- Specialty taxonomy
- 207Q00000X — NUCC code
- State license (1)
- California #00A383800
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1346207883. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,697
Distinct HCPCS
9
Medicare allowed
$156,577
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 665 | 148 | $123 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 662 | 162 | $87 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 91 | 91 | $125 | |
83036 |
Hemoglobin a1c level | 73 | 41 | $10 | |
G0442 |
Annual alcohol misuse screening, 5 to 15 minutes | 71 | 71 | $18 | |
G0444 |
Annual depression screening, 5 to 15 minutes | 69 | 69 | $18 | |
96372 |
Injection of drug or substance under skin or into muscle | 30 | 13 | $14 | |
81002 |
Urinalysis, manual test | 24 | 22 | $3 | |
G0402 |
Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment | 12 | 12 | $160 |
In context: peer comparison
Among 22 peers in Merced Family Medicine Physician, average services per provider: 116. This provider delivers 15× the peer median.Open Payments
Industry payments received
All-time total
$89
Transactions
4
Manufacturers
4
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Bayer Healthcare Pharmaceuticals INC. | 1 | $25.97 | |
| Baxter Healthcare | 1 | $25.51 | |
| Novo Nordisk INC | 1 | $21.26 | |
| Lilly USA, LLC | 1 | $16.69 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,237
Patients
334
Total drug cost
$83,415
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 180 | 27 | $5,363 |
| Atorvastatin Calcium | Generic | 179 | 58 | $3,147 |
| Alprazolam | Generic | 104 | 19 | $972 |
| Montelukast Sodium | Generic | 82 | 24 | $1,528 |
| Albuterol Sulfate Hfa (Albuterol Sulfate) | Brand | 78 | 32 | $2,767 |
| Amlodipine Besylate | Generic | 74 | 20 | $664 |
| Ezetimibe | Generic | 72 | 19 | $3,448 |
| Levothyroxine Sodium | Generic | 71 | 17 | $1,448 |
| Metoprolol Succinate | Generic | 66 | 19 | $1,912 |
| Metformin Hcl | Generic | 65 | 24 | $563 |
Frequently asked questions
What is Dr. Maciej Ossowski's medical specialty?
Dr. Maciej Ossowski practices Family Medicine Physician in Merced, CA.
Where does Dr. Maciej Ossowski practice?
Dr. Maciej Ossowski practices at 3349 G St Ste D, Merced, CA 953400978. Office phone: 2097228040.
What is Dr. Maciej Ossowski's NPI?
Dr. Maciej Ossowski's National Provider Identifier (NPI) is 1346207883, issued by NPPES.
Does Dr. Maciej Ossowski accept Medicare assignment?
Dr. Maciej Ossowski does not accept Medicare assignment for all services. Patients may be billed amounts beyond Medicare-allowed charges.
What procedures does Dr. Maciej Ossowski 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); Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (HCPCS G0439). Source: CMS Medicare Physician & Other Practitioners file.