Internal Medicine, Rheumatology · Somerset, NJ
NPI
1114992773
Since 2006
Specialty
Internal Medicine, Rheumatology
Code 207RR0500X
Group practices
1
Medicare group memberships
Hospitals
2
Hospital affiliations
19 Clyde Rd, #101
Somerset, NJ, 08873
Phone (732) 568-0023
Groups this clinician bills Medicare through
Medicare paid, 2024
$122K
3,651 services
Medicare patients, 2024
318
Average age 73
Drug cost, 2024
$5.9M
5,200 prescriptions
Company payments, 2025
$22K
From 21 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Gregory S Rihacek was code J1010 (injection, methylprednisolone acetate, 1 mg), 1,948 times for 30 patients. In total Gregory S Rihacek billed 3,651 services in 24 codes, and Medicare paid $122K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2026-05-13.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| J1010 Injection, methylprednisolone acetate, 1 mg | Office | 1,948 | 30 | $0.10 | $201 |
| 99214 Office E&M - Established | Office | 984 | 300 | $92.96 | $91K |
| 99213 Office E&M - Established | Office | 187 | 87 | $72.62 | $14K |
| 36415 Venipuncture Blood Collection | Office | 75 | 42 | $8.65 | $649 |
| J1100 Injection, dexamethasone sodium phosphate, 1 mg | Office | 74 | 35 | $0.07 | $5.52 |
| 85651 Clinical Chemistry | Office | 73 | 42 | $4.18 | $305 |
| 99204 Office E&M - New | Office | 69 | 69 | $128.95 | $8,897 |
| 96372 Injection Administration | Office | 46 | 17 | $10.49 | $483 |
| 20610 Joint Injection | Office | 41 | 22 | $61.85 | $2,536 |
| 96401 Chemotherapy Administration | Office | 35 | 20 | $56.48 | $1,977 |
| J3420 Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg | Office | 35 | 11 | $0.98 | $34.23 |
| J1030 Injection, methylprednisolone acetate, 40 mg | Office | 19 | 11 | $4.50 | $85.59 |
| J0897 Injection, denosumab, 1 mg | Office | 16 | 13 | $1.49 | $23.76 |
| 81000 Clinical Chemistry | Office | 16 | 15 | $3.94 | $63.04 |
By year: 2022 $112K for 1,656 services; 2023 $115K for 1,585 services; 2024 $122K for 3,651 services.
Lab tests billed to Medicare, 2024
| Test code | Tests | Patients | Paid per test | Medicare paid |
|---|---|---|---|---|
| 36415 Venipuncture Blood Collection | 75 | 42 | $8.65 | $649 |
| 85651 Clinical Chemistry | 73 | 42 | $4.18 | $305 |
| 81000 Clinical Chemistry | 16 | 15 | $3.94 | $63.04 |
Medicare prescription drug claims, 2024
In 2024, the drug Gregory S Rihacek prescribed most often to Medicare patients was Prednisone, with 359 prescriptions and refills. In total Gregory S Rihacek wrote 5,200 Medicare prescriptions that cost $5.9M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Prednisone Generic | 359 | 589 | 94 | $2,893 |
| Oxycodone Hcl Generic | 202 | 202 | 21 | $7,169 |
| Hydroxychloroquine Sulfate Generic | 189 | 449 | 53 | $8,939 |
| Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen | 167 | 167 | 27 | $4,736 |
| Tramadol Hcl Generic | 140 | 141 | 32 | $1,580 |
| Meloxicam Generic | 134 | 249 | 33 | $667 |
| Methotrexate Methotrexate Sodium | 128 | 287 | 35 | $2,715 |
| Leflunomide Generic | 125 | 272 | 32 | $6,024 |
| Alprazolam Generic | 122 | 128 | 19 | $955 |
| Diclofenac Sodium Generic | 111 | 179 | 25 | $37K |
| Gabapentin Generic | 108 | 157 | 25 | $882 |
| Otezla Apremilast | 99 | 99 | Under 11 | $468K |
| Rinvoq Upadacitinib | 88 | 98 | Under 11 | $606K |
| Methylprednisolone Generic | 80 | 84 | 43 | $551 |
| Azathioprine Generic | 79 | 184 | 16 | $5,627 |
Brand drugs: - claims; generic drugs: 3,970 claims; opioid claims: 937.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Gregory S Rihacek $22K ($22K in general payments such as food, travel and fees) from 21 companies. The largest payer was ANI Pharmaceuticals, Inc. with $7,031.
| Company | Payments | Amount |
|---|---|---|
| ANI Pharmaceuticals, Inc. ANIP | 14 | $7,031 |
| E.R. Squibb & Sons, L.L.C. BMY | 19 | $5,833 |
| Amgen Inc. AMGN | 36 | $3,703 |
| Janssen Biotech, Inc. JNJ | 57 | $1,734 |
| Abbvie Inc. ABBV | 45 | $1,002 |
| AstraZeneca Pharmaceuticals LP AZN | 14 | $412 |
| UCB, Inc. UCB.BR | 19 | $410 |
| Actelion Pharmaceuticals US, Inc. JNJ | 3 | $284 |
| Novartis Pharmaceuticals Corporation NVS | 14 | $267 |
| Alexion Pharmaceuticals, Inc. AZN | 2 | $244 |
Official US government data on Original Medicare services, Medicare prescription drug plans and the payments drug and device companies must report. Services with fewer than 11 patients and drugs with fewer than 11 claims are not published. Procedure codes are shown by number with their public category.