NPI registry status
Active
2026 NPPES data Endocrinology, Diabetes & Metabolism Physician NPI 1366535783 M.D.
Verify on CMS → Reshma Markan, M.D.
Endocrinology, Diabetes & Metabolism Physician in Houston, Texas.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 8,078 in Endocrinology, Diabetes & Metabolism 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
3K
Medicare Part D claims · 287 beneficiaries · Endocrinology, Diabetes & Metabolism Physician avg: 3K
Generic prescribing
54%
generic claims · 42% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.3K
55 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Reshma Markan, M.D. filed 3,325 Medicare Part D claims in 2024 as an Endocrinology, Diabetes & Metabolism Physician in Houston, Texas, prescribing 54% generic.
- 3K
- Part D claims, 2024
- 54%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥89th
- pct by Part D claim volume (lower-bound band)
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 Reshma Markan, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1366535783), first enumerated 09/30/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 3,325 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- 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
- Reported
Industry payment transparency
$1.3K in reported industry payments (55 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
Texas statewide board action statistics are published annually — these figures describe aggregate state activity, not Reshma Markan, M.D.'s individual license status. Verify directly with the state medical board.
Source: TMB annual report 2023
- 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 1366535783 · Endocrinology, Diabetes & Metabolism Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-MID · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1366535783
- ENUM-LEGACY 2006
- TAX-MID 8K Endocrinology, Diabetes
- RX-MID 3,325
- BOOK-LIGHT 537 in Texas
- PHOTO-ENUM Kris Iyer · 2006
Reshma Markan, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
3,325 ≥ 89th percentile 89% of 1,416,883 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. 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 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Reshma Markan, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Reshma Markan, M.D.?
Quality data not reportedPrimary specialty
Endocrinology, Diabetes & Metabolism Physician
Medicare Part D claims
3,325 21% vs specialty avg
Specialty distribution in Texas
How Endocrinology, Diabetes & Metabolism Physician compares to other specialties among Texas providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Endocrinology, Diabetes & Metabolism Physician. Verify directly:
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 | 1366535783 |
|---|---|
| Specialty | Endocrinology, Diabetes & Metabolism Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 09/30/2006 |
Hospital and facility affiliations
Facilities where Reshma Markan, M.D. 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.
Rocio A Harbison MD PA
Houston, TX
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Reshma Markan, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$1.3K
Largest payer
Novo Nordisk Inc
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - Texas TMB 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~77K Texas medical licensees in 2023 - they are NOT specific to Reshma Markan, M.D.. To verify Reshma Markan, M.D.'s current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases
TMB publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
Reshma Markan, M.D. - brand share 42.0%
Endocrinology, Diabetes & Metabolism Physician average
42% brand-name claims vs 54% generic, on 3,325 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.
3,325
Total Claims
$1.5M
Total Drug Cost
287
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 8,084.5
- Total Day Supply
- 239,786
- Brand vs Generic
- 42% brand / 54% generic
- Brand Drug Cost
- $1.4M
- Generic Drug Cost
- $36K
- Antibiotic Claims
- 20
Patient Demographics
- Average Patient Age
- 71.2 years
- Avg HCC Risk Score
- 1.53
- Gender Split
- 63% female / 37% male
- Age Distribution
- <65: 30, 65-74: 160, 75-84: 82, 85+: 15
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Reshma Markan, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Metformin Hcl Er
Metformin Hcl Er
258 claims
- Ozempic
Ozempic
174 claims
- Mounjaro
Mounjaro
150 claims
- Levothyroxine Sodium
Levothyroxine Sodium
139 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
117 claims
- Jardiance 101
Jardiance
101 claims
- Atorvastatin Calcium 88
Atorvastatin Calcium
88 claims
- Farxiga 85
Farxiga
85 claims
| Drug | Claims |
|---|---|
| Metformin Hcl Er Metformin Hcl | 258 |
| Ozempic Semaglutide | 174 |
| Mounjaro Tirzepatide | 150 |
| Levothyroxine Sodium | 139 |
| Rosuvastatin Calcium | 117 |
| Jardiance Empagliflozin | 101 |
| Atorvastatin Calcium | 88 |
| Farxiga Dapagliflozin Propanediol | 85 |
| Toujeo Solostar Insulin Glargine,hum.Rec.Anlog | 78 |
| Synthroid Levothyroxine Sodium | 74 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Endocrinology, Diabetes & Metabolism Physician in TX →
All providers in Texas →
Compare specialties →
Endocrinology, Diabetes & Metabolism Physician Overview
How Reshma Markan, M.D. fits within the Endocrinology, Diabetes & Metabolism Physician landscape nationally.
8,078
Endocrinology, Diabetes & Metabolism Physician Providers in US
54
States with Endocrinology, Diabetes & Metabolism Physician
2,739
Avg Claims per Provider
Reshma Markan, M.D.'s 3,325 claims are above the specialty average of 2,739.
Nationwide Endocrinology, Diabetes & Metabolism Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Markan, both outside Texas so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Endocrinology, Diabetes & Metabolism Physician Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Markan.
One of 537 Endocrinology, Diabetes & Metabolism Physician providers enrolled in Texas, 5 are shown here.
Dr. Nicola Abate
MD
Baytown, TX
Dr. Jessica Abramowitz
MD
Dallas, TX
Dr. Layla Abushamat
M.D., M.P.H.
Houston, TX
Dr. Luis Acosta
MD
Houston, TX
Dr. Stefanie Addington
M.D.
Frisco, TX
Compare Endocrinology, Diabetes & Metabolism Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Reshma Markan, M.D.'s specialty? ▼
Reshma Markan, M.D. specializes in Endocrinology, Diabetes & Metabolism Physician and practices in Houston, Texas. Credentials: M.D..
How much does Reshma Markan, M.D. prescribe under Medicare Part D? ▼
In 2024, Reshma Markan, M.D. wrote 3,325 Medicare Part D claims totaling $1.5M in drug costs for 287 beneficiaries.
Where is Reshma Markan, M.D. located? ▼
Reshma Markan, M.D. is located at 7400 FANNIN ST STE 855, Houston, TX, 77054. Phone: (713) 796-9466.
What is Reshma Markan, M.D.'s NPI number? ▼
Reshma Markan, M.D.'s National Provider Identifier (NPI) is 1366535783, issued on 09/30/2006.
Does Reshma Markan, M.D. prescribe more brand-name or generic drugs? ▼
Reshma Markan, M.D.'s prescribing is 42% brand-name and 54% generic drugs by claim count, with $1.4M in brand drug costs.
How many Endocrinology, Diabetes & Metabolism Physician providers are there in the US? ▼
There are 8,078 Endocrinology, Diabetes & Metabolism Physician providers across 54 states in the US. The average Endocrinology, Diabetes & Metabolism Physician provider writes 2,739 Medicare Part D claims per year.
What drugs does Reshma Markan, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Reshma Markan, M.D.'s most frequently prescribed drugs include Metformin Hcl Er, Ozempic, Mounjaro. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Reshma Markan, M.D. accept Medicare? ▼
Reshma Markan, M.D. appears in CMS Medicare data with 3,325 Part D claims and 287 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Reshma Markan, M.D.'s credentials? ▼
Reshma Markan, M.D.'s NPI is 1366535783 with credentials M.D.. 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.
- 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.