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AHN, GRACEM.D. NPI 1982884896 Clinician

Rheumatology · ROCKVILLE, MD

Specialty Rheumatology — from billed Medicare claims
Trained UNIVERSITY OF VIRGINIA SCHOOL OF MEDICINE — medical school, self-reported to CMS
In practice about 20 years since medical school (class of 2006, self-reported to CMS)
Location ROCKVILLE, MD · NPPES registered location
Active in data Billed Medicare 2020–2024 (5 consecutive years)
Scale 58 codes billed · 74,704 disclosed services (CY2024 — most recent year in data)
Current groups

Group affiliation since 2019

20192026
ARTHRITIS AND RHEUMATISM ASSOCIATES PC
2019–2026
INOVA HEALTH CARE SERVICES
2024

The roster archive begins in 2019, so a span starting at 2019 may reach back further. Membership spans only — no volume is attributed to any group here.

NPPES registry · CMS Doctors & Clinicians registry · Medicare Part B physician/supplier claims · NPPES record last updated 2026-02

Year: 2024 · 2023 · 2022  · 2021  · 2020 

Provider overview · all codes · CY2024

The full analytics for this provider

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The billed-volume positioning, practice focus, and economics behind this provider — computed on the same disclosed Medicare Part B data.

This provider's disclosed Medicare payments across all codes were in CY2024. Included with Platform.

  • Payment, service & beneficiary totals — the disclosed scale, all codes
  • Practice profile — focus & reach — top codes by share of services
  • Office vs. facility setting mix — place-of-service code split
  • Volume over five years — discrete yearly counts, no rate
  • Peer positioning — service volume — percentile among specialty peers, cohort & year disclosed
  • Peer positioning — code breadth — how many codes billed, vs peers

Peer positioning shows billed-volume and code-breadth positions among specialty peers, not measures of care (a provider's true volume position can only be higher, never lower). All figures disclosed Medicare Part B fee-for-service; volumes are personal to this NPI, not attributed to any group.

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Procedures billed to Medicare Part B (2024)

Medicare Part B FFS · CY2024 · as published by CMS
CodeDescription Services Beneficiary-episodes Avg charge Avg Medicare payment
J3262 Injection, tocilizumab, 1 mg
J0897 Injection, denosumab, 1 mg
J3111 Injection, romosozumab-aqqg, 1 mg
J1602 Injection, golimumab, 1 mg, for intravenous use
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)
J7320 Hyaluronan or derivitive, genvisc 850, for intra-articular injection, 1 mg
Q5104 Injection, infliximab-abda, biosimilar, (renflexis), 10 mg
J1010 Injection, methylprednisolone acetate, 1 mg
G2211 Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's
J1745 Injection, infliximab, excludes biosimilar, 10 mg
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
36415 Insertion of needle into vein for collection of blood sample
86140 Measurement c-reactive protein for detection of infection or inflammation
80053 Blood test, comprehensive group of blood chemicals
85652 Red blood cell sedimentation rate, to detect inflammation, automated
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count
77080 Dxa bone density measurement of hip, pelvis, spine
82306 Vitamin d-3 level
99213 Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
96413 Administration of chemotherapy into vein, 1 hour or less
96401 Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle
86235 Measurement of antibody for assessment of autoimmune disorder, any method
J3489 Injection, zoledronic acid, 1 mg
86160 Measurement of complement (immune system proteins), antigen,
73130 X-ray of hand, minimum of 3 views
96372 Injection of drug or substance under skin or into muscle
80048 Blood test, basic group of blood chemicals (calcium, total)
73630 X-ray of foot, minimum of 3 views
86255 Screening test for antibody to noninfectious agent
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance
82310 Calcium level, total
76881 Complete ultrasound scan of joint
96415 Administration of chemotherapy into vein, each additional hour
84550 Uric acid level, blood
73610 X-ray of ankle, minimum of 3 views
96365 Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less
73562 X-ray of knee, 3 views
81001 Manual urinalysis test with examination using microscope, automated
82570 Creatinine level to test for kidney function or muscle injury
84156 Total protein level, urine
86431 Rheumatoid factor level
86200 Measurement of antibody for rheumatoid arthritis assessment
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more
84165 Protein measurement, serum
G0008 Administration of influenza virus vaccine
90653 Influenza vaccine, inactivated
84155 Total protein level, blood
73030 X-ray of shoulder, minimum of 2 views
76942 Ultrasonic guidance for needle placement
96375 Injection of additional new drug or substance into vein
72100 X-ray of lower and sacral spine, 2-3 views
99442 Telephone medical discussion with physician, 11-20 minutes
73560 X-ray of knee, 1-2 views
73565 X-ray of both knees while standing
82550 Creatine kinase (cardiac enzyme) level, total
86038 Screening test for autoimmune disorder

These are this provider's own Medicare Part B fee-for-service volumes (CMS public data). CMS suppresses rows with fewer than 11 beneficiaries, so low-volume codes may be missing entirely — absence is not zero. Beneficiary-episodes count CMS's per-setting beneficiary figures, not unique patients. Average charge and average Medicare payment are weighted by service volume across office and facility settings. Volumes on this page are personal to the NPI and are not attributed to any physician group. See Methods & Sources.