NPI registry status
Active
2026 NPPES data Rheumatology Physician NPI 1235460866 MD
Verify on CMS → Homa Timlin, MD
Rheumatology Physician in Baltimore, Maryland.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,377 in Rheumatology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
355
Medicare Part D claims · 63 beneficiaries · Rheumatology Physician avg: 2K
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
74.4/100
▼ 9 pts below national avg 83.5 · Mid-tier
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Homa Timlin, MD reported a CMS MIPS final score of 74.4/100 - below the 83.5 national average - and filed 355 Medicare Part D claims in 2024.
- 74.4/100
- MIPS score · -9 vs avg
- 355
- Part D claims, 2024
- 88%
- generic prescribing
- Likely
- board-certified (heuristic)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Homa Timlin, MD
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1235460866), first enumerated 01/21/2010.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 355 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 74.4/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1235460866 · Rheumatology Physician
NPI-10 · ENUM-MID · TAX-MID · MIPS-BELOW · RX-LIGHT · BOOK-THIN · PHOTO-FINISH
- NPI-10 1235460866
- ENUM-MID 2010
- TAX-MID 6K Rheumatology Physician
- MIPS-BELOW 74.4/100
- RX-LIGHT 355
- BOOK-THIN 184 in Maryland
- PHOTO-FINISH Zsuzsanna McMahan, M… · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Timlin · this pr…
Timlin · this provider
74.4 MIPS pts
- Zsuzsanna McMaha…
Zsuzsanna McMahan, MD, MHS
74.4 MIPS pts
- Komal Patel · near
Komal Patel
74.4 MIPS pts
- Eleni Tiniakou, …
Eleni Tiniakou, M.D.
74.4 MIPS pts
- Alfredo Aguirre,…
Alfredo Aguirre, M.D.
74.5 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Homa Timlin, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
74 ≥ 13th percentile 13% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Homa Timlin, MD sits
This provider among rheumatology physician peers
Across the 1,970 rheumatology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Homa Timlin, MD writes more Part D claims than 10% of them and scores higher on MIPS quality than 14% - placing this provider in the lower-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one rheumatology physician peer from a representative sample of 60; the gold marker is Homa Timlin, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Homa Timlin, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Homa Timlin, MD?
Below national averagePrimary specialty
Rheumatology Physician
Medicare Part D claims
355 83% vs specialty avg
MIPS final score
74.4/100 9.1 pts vs avg
Specialty distribution in Maryland
How Rheumatology Physician compares to other specialties among Maryland providers
Medicare quality performance, MIPS
Homa Timlin, MD's 2023 MIPS final score plotted against the Rheumatology Physician national average
- MIPS Final Score
- 74.4/100
- vs 83.5 national avg · 2023 performance year
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1235460866 |
|---|---|
| Specialty | Rheumatology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 01/21/2010 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
74.3962
Final Score
Measured-score avg: 83.5
64.7185
Quality
52.4354
Cost
97
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Homa Timlin, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Johns Hopkins University
Baltimore, MD
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Typical
Homa Timlin, MD - brand share 12.0%
Rheumatology Physician average
12% brand-name claims vs 88% generic, on 355 2024 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
355
Total Claims
$354K
Total Drug Cost
63
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 860.967
- Total Day Supply
- 25,339
- Brand vs Generic
- 12% brand / 88% generic
- Brand Drug Cost
- $338K
- Generic Drug Cost
- $16K
Patient Demographics
- Average Patient Age
- 63.1 years
- Avg HCC Risk Score
- 1.64
- Age Distribution
- <65: 28, 65-74: 27, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Homa Timlin, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Hydroxychloroquine…
Hydroxychloroquine Sulfate
165 claims
- Mycophenolate Mofe… 32
Mycophenolate Mofetil
32 claims
- Benlysta 25
Benlysta
25 claims
- Prednisone 25
Prednisone
25 claims
- Famotidine 24
Famotidine
24 claims
- Lupkynis 16
Lupkynis
16 claims
- Leflunomide 11
Leflunomide
11 claims
| Drug | Claims |
|---|---|
| Hydroxychloroquine Sulfate | 165 |
| Mycophenolate Mofetil | 32 |
| Benlysta Belimumab | 25 |
| Prednisone | 25 |
| Famotidine | 24 |
| Lupkynis Voclosporin | 16 |
| Leflunomide | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Rheumatology Physician Overview
How Homa Timlin, MD fits within the Rheumatology Physician landscape nationally.
6,377
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,058
Avg Claims per Provider
Homa Timlin, MD's 355 claims are below the specialty average of 2,058.
Nationwide Rheumatology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Timlin, both outside Maryland so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (74.4 here).
Same NPPES enumeration year (2010)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Rheumatology Physician Providers in Maryland
Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as Timlin.
One of 184 Rheumatology Physician providers enrolled in Maryland, 5 are shown here.
Dr. Jonathan Adelson
M.D.
Greenbelt, MD
Dr. Naila Ahmad
MD
Easton, MD
Dr. Grace Ahn
M.D.
Rockville, MD
Dr. Ashika Ajitkumar
MD
Baltimore, MD
Dr. Maria Alba-Dauhajre
MD
Silver Spring, MD
Compare Rheumatology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Homa Timlin, MD's specialty? ▼
Homa Timlin, MD specializes in Rheumatology Physician and practices in Baltimore, Maryland. Credentials: MD.
How much does Homa Timlin, MD prescribe under Medicare Part D? ▼
In 2024, Homa Timlin, MD wrote 355 Medicare Part D claims totaling $354K in drug costs for 63 beneficiaries.
What is Homa Timlin, MD's Medicare quality score? ▼
Homa Timlin, MD has a CMS MIPS Final Score of 74.4/100 (Quality: 64.7, Cost: 52.4). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Homa Timlin, MD located? ▼
Homa Timlin, MD is located at 5501 HOPKINS BAYVIEW CIR, Baltimore, MD, 21224. Phone: (410) 550-7716.
What is Homa Timlin, MD's NPI number? ▼
Homa Timlin, MD's National Provider Identifier (NPI) is 1235460866, issued on 01/21/2010.
Does Homa Timlin, MD prescribe more brand-name or generic drugs? ▼
Homa Timlin, MD's prescribing is 12% brand-name and 88% generic drugs by claim count, with $338K in brand drug costs.
How many Rheumatology Physician providers are there in the US? ▼
There are 6,377 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,058 Medicare Part D claims per year.
What drugs does Homa Timlin, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Homa Timlin, MD's most frequently prescribed drugs include Hydroxychloroquine Sulfate, Mycophenolate Mofetil, Benlysta. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Homa Timlin, MD accept Medicare? ▼
Homa Timlin, MD appears in CMS Medicare data with 355 Part D claims and 63 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Homa Timlin, MD's credentials? ▼
Homa Timlin, MD's NPI is 1235460866 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.