Doctor profile · Federal record
Dr. Gregory Haase, DO
Internal Medicine Physician (CMS: Internal Medicine) · Warsaw, IN
- NPI 1851357032
- Accepts Medicare
- MIPS 87.0 / 100 · 2023
- 45 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
355 E 200 N
Warsaw, IN 465827855
(574) 372-5625
fax (574) 372-5626 - Mailing address
-
11109 Parkview Plaza Dr # 117
Fort Wayne, IN 468451701
Credentials & registration
- NPI registered
- April 2006 — 20 yrs on file
- Profile last updated
- April 6, 2026
- Year of graduation
- 1981 — 45 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Indiana #02000857A
- Medicaid
- IN #100158930
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1851357032. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
2,596
Distinct HCPCS
10
Medicare allowed
$194,494
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 1,264 | 361 | $119 | |
36415 |
Insertion of needle into vein for collection of blood sample | 633 | 266 | $8 | |
J3301 |
Injection, triamcinolone acetonide, not otherwise specified, 10 mg | 96 | 11 | $1 | |
96372 |
Injection of drug or substance under skin or into muscle | 89 | 27 | $13 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 66 | 66 | $123 | |
G0008 |
Administration of influenza virus vaccine | 62 | 62 | $29 | |
90688 |
Influenza vaccine, quadrivalent, 0.5 ml dosage | 56 | 56 | $20 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 53 | 47 | $85 | |
81003 |
Automated urinalysis test | 49 | 42 | $2 | |
99495 |
Transitional care management services for problem of at least moderate complexity | 49 | 38 | $193 |
In context: peer comparison
Among 2 peers in this city , average services per provider: 160. This provider delivers 16× the peer median.Open Payments
Industry payments received
All-time total
$16
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| PFIZER INC. | 1 | $15.64 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
6,138
Patients
1,740
Total drug cost
$93,852
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Levothyroxine Sodium | Generic | 753 | 201 | $12,904 |
| Amlodipine Besylate | Generic | 571 | 161 | $3,879 |
| Atorvastatin Calcium | Generic | 550 | 164 | $5,250 |
| Metoprolol Succinate | Generic | 515 | 145 | $11,217 |
| Gabapentin | Generic | 438 | 113 | $13,741 |
| Losartan Potassium | Generic | 406 | 124 | $4,747 |
| Potassium Chloride | Generic | 394 | 106 | $12,110 |
| Lisinopril | Generic | 368 | 96 | $2,875 |
| Rosuvastatin Calcium | Generic | 355 | 105 | $5,565 |
| Pantoprazole Sodium | Generic | 352 | 105 | $5,401 |
Frequently asked questions
What is Dr. Gregory Haase's medical specialty?
Dr. Gregory Haase practices Internal Medicine Physician in Warsaw, IN.
Where does Dr. Gregory Haase practice?
Dr. Gregory Haase practices at 355 E 200 N, Warsaw, IN 465827855. Office phone: 5743725625.
What is Dr. Gregory Haase's NPI?
Dr. Gregory Haase's National Provider Identifier (NPI) is 1851357032, issued by NPPES.
Does Dr. Gregory Haase accept Medicare assignment?
Yes. Dr. Gregory Haase accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gregory Haase commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Insertion of needle into vein for collection of blood sample (HCPCS 36415); Injection, triamcinolone acetonide, not otherwise specified, 10 mg (HCPCS J3301). Source: CMS Medicare Physician & Other Practitioners file.