Doctor profile · Federal record
Dr. Mark Obrien, MD
Internal Medicine Physician (CMS: Internal Medicine) · Pediatrics Physician · Benton Harbor, MI
- NPI 1841221348
- Accepts Medicare
- 42 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
800 M 139
Benton Harbor, MI 490223881
(269) 927-5400
fax (269) 927-5493 - Mailing address
-
50 Industrial Park Drive
Bangor, MI 49013
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- January 7, 2013
- Year of graduation
- 1984 — 42 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Michigan #4301080677
- Medicaid
- MI #4605349
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1841221348. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
152
Distinct HCPCS
2
Medicare allowed
$1,282
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
83036 |
Hemoglobin a1c level | 125 | 72 | $10 | |
81002 |
Urinalysis, manual test | 27 | 24 | $3 |
In context: peer comparison
Among 4 peers in Benton Harbor Internal Medicine Physician, average services per provider: 68. This provider delivers 2.2× the peer median.Open Payments
Industry payments received
All-time total
$40
Transactions
2
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Merck Sharp & Dohme LLC | 1 | $25.20 | |
| Lilly USA, LLC | 1 | $14.78 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
4,754
Patients
1,225
Total drug cost
$49,143
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Amlodipine Besylate | Generic | 707 | 181 | $3,978 |
| Atorvastatin Calcium | Generic | 577 | 163 | $8,273 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 501 | 96 | $4,643 |
| Lisinopril | Generic | 379 | 95 | $3,176 |
| Omeprazole | Generic | 366 | 88 | $4,206 |
| Hydrochlorothiazide | Generic | 350 | 97 | $1,082 |
| Gabapentin | Generic | 283 | 58 | $3,220 |
| Metformin Hcl | Generic | 275 | 74 | $2,337 |
| Losartan Potassium | Generic | 239 | 59 | $2,642 |
| Albuterol Sulfate Hfa (Albuterol Sulfate) | Brand | 231 | 82 | $6,528 |
Frequently asked questions
What is Dr. Mark Obrien's medical specialty?
Dr. Mark Obrien practices Internal Medicine Physician in Benton Harbor, MI.
Where does Dr. Mark Obrien practice?
Dr. Mark Obrien practices at 800 M 139, Benton Harbor, MI 490223881. Office phone: 2699275400.
What is Dr. Mark Obrien's NPI?
Dr. Mark Obrien's National Provider Identifier (NPI) is 1841221348, issued by NPPES.
Does Dr. Mark Obrien accept Medicare assignment?
Yes. Dr. Mark Obrien accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Obrien commonly perform?
Top Medicare-reported procedures in 2023: Hemoglobin a1c level (HCPCS 83036); Urinalysis, manual test (HCPCS 81002). Source: CMS Medicare Physician & Other Practitioners file.