Doctor profile · Federal record
Dr. Grace Ahn, M.D.
Rheumatology Physician (CMS: Rheumatology) · Rockville, MD
- NPI 1982884896
- Accepts Medicare
- MIPS 77.1 / 100 · 2023
- 20 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
14995 Shady Grove RD Ste 500
Rockville, MD 208508726
(301) 942-7600 - Additional location
-
8270 Willow Oaks Corporate Dr Ste 150
Fairfax, VA 220314530
(703) 573-2220 - Mailing address
-
7361 Calhoun Pl Ste 600
Rockville, MD 208552788
Credentials & registration
- NPI registered
- November 2007 — 19 yrs on file
- Profile last updated
- February 5, 2026
- Year of graduation
- 2006 — 20 yrs since
- Specialty taxonomy
- 207RR0500X — NUCC code
- State license (1)
- Maryland #D76362
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1982884896. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
29,219
Distinct HCPCS
10
Medicare allowed
$658,487
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
J3262 |
Injection, tocilizumab, 1 mg | 9,760 | 12 | $6 | |
J0897 |
Injection, denosumab, 1 mg | 6,000 | 87 | $23 | |
J7320 |
Hyaluronan or derivitive, genvisc 850, for intra-articular injection, 1 mg | 3,500 | 18 | $7 | |
J0129 |
Injection, abatacept, 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered) | 1,875 | 14 | $41 | |
Q5104 |
Injection, infliximab-abda, biosimilar, (renflexis), 10 mg | 1,360 | 13 | $35 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 953 | 439 | $145 | |
36415 |
Insertion of needle into vein for collection of blood sample | 754 | 414 | $8 | |
86140 |
Measurement c-reactive protein for detection of infection or inflammation | 507 | 222 | $5 | |
80053 |
Blood test, comprehensive group of blood chemicals | 478 | 229 | $10 | |
85652 |
Red blood cell sedimentation rate, to detect inflammation, automated | 429 | 204 | $3 |
In context: peer comparison
Among 8 peers in Rockville Rheumatology Physician, average services per provider: 1,219. This provider delivers 24× the peer median.Open Payments
Industry payments received
All-time total
$137
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Novartis Pharmaceuticals Corporation | 1 | $137.40 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,083
Patients
305
Total drug cost
$557,504
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Hydroxychloroquine Sulfate | Generic | 167 | 48 | $12,609 |
| Prednisone | Generic | 165 | 40 | $1,636 |
| Methotrexate (Methotrexate Sodium) | Brand | 157 | 48 | $8,288 |
| Alendronate Sodium | Generic | 89 | 30 | $1,147 |
| Leflunomide | Generic | 68 | 21 | $7,266 |
| Allopurinol | Generic | 67 | 18 | $1,322 |
| Diclofenac Sodium | Generic | 60 | 35 | $1,786 |
| Meloxicam | Generic | 51 | 22 | $604 |
| Gabapentin | Generic | 48 | 13 | $785 |
| Celecoxib | Generic | 45 | 16 | $1,534 |
Frequently asked questions
What is Dr. Grace Ahn's medical specialty?
Dr. Grace Ahn practices Rheumatology Physician in Rockville, MD.
Where does Dr. Grace Ahn practice?
Dr. Grace Ahn practices at 14995 Shady Grove RD Ste 500, Rockville, MD 208508726. Office phone: 3019427600.
What is Dr. Grace Ahn's NPI?
Dr. Grace Ahn's National Provider Identifier (NPI) is 1982884896, issued by NPPES.
Does Dr. Grace Ahn accept Medicare assignment?
Yes. Dr. Grace Ahn accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Grace Ahn commonly perform?
Top Medicare-reported procedures in 2023: Injection, tocilizumab, 1 mg (HCPCS J3262); Injection, denosumab, 1 mg (HCPCS J0897); Hyaluronan or derivitive, genvisc 850, for intra-articular injection, 1 mg (HCPCS J7320). Source: CMS Medicare Physician & Other Practitioners file.