Doctor profile · Federal record
Dr. Mark Ensberg, MD
Geriatric Medicine (Internal Medicine) Physician (CMS: Internal Medicine) · Holt, MI
- NPI 1912936527
- Accepts Medicare
- 45 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
5091 Willoughby RD
Holt, MI 488421054
(517) 694-2144
fax (517) 694-6570 - Mailing address
-
804 Service RD Ste A109B
East Lansing, MI 488247015
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- June 12, 2019
- Year of graduation
- 1981 — 45 yrs since
- Specialty taxonomy
- 207RG0300X — NUCC code
- State license (1)
- Michigan #4301048610
- Medicaid
- MI #2655771
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1912936527. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
198
Distinct HCPCS
4
Medicare allowed
$20,665
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99309 |
Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | 97 | 30 | $104 | |
99308 |
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes | 64 | 27 | $73 | |
99310 |
Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes | 23 | 14 | $150 | |
99306 |
Initial nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes | 14 | 14 | $178 |
In context: peer comparison
Among 1 peers in Holt Geriatric Medicine (Internal Medicine) Physician, average services per provider: 49. This provider delivers 4.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
1,239
Patients
110
Total drug cost
$68,366
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Eliquis (Apixaban) | Brand | 130 | 11 | $34,421 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 130 | 15 | $1,673 |
| Atorvastatin Calcium | Generic | 127 | 18 | $1,697 |
| Levothyroxine Sodium | Generic | 124 | 18 | $1,280 |
| Duloxetine Hcl | Generic | 102 | 12 | $2,946 |
| Gabapentin | Generic | 101 | 0 | $1,393 |
| Pantoprazole Sodium | Generic | 101 | 0 | $2,146 |
| Xarelto (Rivaroxaban) | Brand | 62 | 0 | $17,912 |
| Amlodipine Besylate | Generic | 60 | 11 | $536 |
| Potassium Chloride | Generic | 59 | 13 | $819 |
Frequently asked questions
What is Dr. Mark Ensberg's medical specialty?
Dr. Mark Ensberg practices Geriatric Medicine (Internal Medicine) Physician in Holt, MI.
Where does Dr. Mark Ensberg practice?
Dr. Mark Ensberg practices at 5091 Willoughby RD, Holt, MI 488421054. Office phone: 5176942144.
What is Dr. Mark Ensberg's NPI?
Dr. Mark Ensberg's National Provider Identifier (NPI) is 1912936527, issued by NPPES.
Does Dr. Mark Ensberg accept Medicare assignment?
Yes. Dr. Mark Ensberg accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Ensberg commonly perform?
Top Medicare-reported procedures in 2023: Subsequent nursing facility care with moderate level of medical decision making (HCPCS 99309); Subsequent nursing facility care with straightforward level of medical decision making (HCPCS 99308); Subsequent nursing facility care with high level of medical decision making (HCPCS 99310). Source: CMS Medicare Physician & Other Practitioners file.