Jay Kim, M.D.
NPI 1811984123 · Rheumatology Physician · Fullerton, CA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jay Kim, M.D. is a Rheumatology Physician provider in Fullerton, CA (NPI 1811984123).
Provider details
- NPI number
- 1811984123
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A532285 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,080 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 453 | $138 |
| 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'SG2211 | 413 | $17 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 77 | $230 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 28 | $179 |
| Dxa Bone Density Measurement of Hip, Pelvis, Spine77080 | 26 | $44 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 38 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Methotrexate Sodiumbrand: Methotrexate | 409 | 136 |
| Diclofenac Sodium | 262 | 95 |
| Prednisone | 216 | 88 |
| Hydroxychloroquine Sulfate | 202 | 65 |
| Gabapentin | 137 | 47 |
| Meloxicam | 130 | 50 |
| Sulfasalazine | 112 | 40 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,614 across 114 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-10-03
- Last updated
- 2021-11-05
- Certified
- 2021-11-05
Frequently asked questions
- What is Jay Kim's NPI number?
- Jay Kim's National Provider Identifier (NPI) is 1811984123, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jay Kim's specialty?
- Jay Kim is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Jay Kim located?
- Jay Kim's practice location on file with NPPES is 2141 N Harbor Blvd Ste 25000, Fullerton, CA 92835-3830.
- What is Jay Kim's phone number?
- The practice phone number listed in the NPPES registry for Jay Kim is (714) 626-8650.
- Does Jay Kim accept Medicare?
- Jay Kim is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jay Kim's NPI active?
- Yes — Jay Kim's NPI (1811984123) is active in the NPPES registry as of the last update on 2021-11-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.