NPI registry status
Active
2026 NPPES data Allergy Physician NPI 1386619583 M.D.
Verify on CMS → Hidayat Khan, M.D.
Allergy Physician in Frederick, 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 1,015 in Allergy 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
455
Medicare Part D claims · 111 beneficiaries · Allergy Physician avg: 805
Generic prescribing
71%
generic claims · 29% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.7K
71 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Hidayat Khan, M.D. filed 455 Medicare Part D claims in 2024 as an Allergy Physician in Frederick, Maryland, prescribing 71% generic.
- 455
- Part D claims, 2024
- 71%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥61st
- 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 Hidayat Khan, 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 1386619583), first enumerated 02/21/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 455 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
$1.7K in reported industry payments (71 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- 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 1386619583 · Allergy Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1386619583
- ENUM-LEGACY 2006
- TAX-NARROW 1,015
- RX-LIGHT 455
- BOOK-THIN 36 in Maryland
- PHOTO-ENUM Gregory Toci, DO · 2006
Hidayat Khan, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
455 ≥ 61st percentile 61% 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)
Hidayat Khan, 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 Hidayat Khan, M.D.?
Quality data not reportedPrimary specialty
Allergy Physician
Medicare Part D claims
455 43% vs specialty avg
Specialty distribution in Maryland
How Allergy Physician compares to other specialties among Maryland 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 Allergy 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 | 1386619583 |
|---|---|
| Specialty | Allergy Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 02/21/2006 |
Hospital and facility affiliations
Facilities where Hidayat Khan, 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.
Asthma And Allergy Center LLC
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).
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 Hidayat Khan, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$1.7K
Largest payer
GENZYME CORPORATION
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.
Brand vs generic prescribing mix · Above average
Hidayat Khan, M.D. - brand share 29.0%
Allergy Physician average
29% brand-name claims vs 71% generic, on 455 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.
455
Total Claims
$132K
Total Drug Cost
111
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 709.033
- Total Day Supply
- 19,615
- Brand vs Generic
- 29% brand / 71% generic
- Brand Drug Cost
- $119K
- Generic Drug Cost
- $13K
- Antibiotic Claims
- 28
Patient Demographics
- Average Patient Age
- 69.2 years
- Avg HCC Risk Score
- 1.04
- Gender Split
- 71% female / 29% male
- Age Distribution
- <65: 25, 65-74: 46, 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 Hidayat Khan, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Montelukast Sodium
Montelukast Sodium
68 claims
- Azelastine Hcl
Azelastine Hcl
39 claims
- Fluticasone Propio…
Fluticasone Propionate
38 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
36 claims
- Desloratadine
Desloratadine
35 claims
- Trelegy Ellipta
Trelegy Ellipta
28 claims
- Dupixent Syringe 16
Dupixent Syringe
16 claims
- Arnuity Ellipta 12
Arnuity Ellipta
12 claims
| Drug | Claims |
|---|---|
| Montelukast Sodium | 68 |
| Azelastine Hcl | 39 |
| Fluticasone Propionate | 38 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 36 |
| Desloratadine | 35 |
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 28 |
| Dupixent Syringe Dupilumab | 16 |
| Arnuity Ellipta Fluticasone Furoate | 12 |
| Doxycycline Monohydrate | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Allergy Physician Overview
How Hidayat Khan, M.D. fits within the Allergy Physician landscape nationally.
1,015
Allergy Physician Providers in US
50
States with Allergy Physician
805
Avg Claims per Provider
Hidayat Khan, M.D.'s 455 claims are below the specialty average of 805.
Nationwide Allergy Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Khan, both outside Maryland 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 Allergy Physician Providers in Maryland
Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as Khan.
One of 36 Allergy Physician providers enrolled in Maryland, 5 are shown here.
Dr. Ali Abrishami
MD
Greenbelt, MD
Dr. Newton Adkinson
M.D.
Baltimore, MD
Dr. John Bacon
M.D.
Towson, MD
Dr. Douglas Beakes
MD
Bethesda, MD
Dr. Denise Chevalier
MD
Largo, MD
Compare Allergy Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Hidayat Khan, M.D.'s specialty? ▼
Hidayat Khan, M.D. specializes in Allergy Physician and practices in Frederick, Maryland. Credentials: M.D..
How much does Hidayat Khan, M.D. prescribe under Medicare Part D? ▼
In 2024, Hidayat Khan, M.D. wrote 455 Medicare Part D claims totaling $132K in drug costs for 111 beneficiaries.
Where is Hidayat Khan, M.D. located? ▼
Hidayat Khan, M.D. is located at 801 TOLL HOUSE AVE, Frederick, MD, 21701. Phone: (301) 694-4935.
What is Hidayat Khan, M.D.'s NPI number? ▼
Hidayat Khan, M.D.'s National Provider Identifier (NPI) is 1386619583, issued on 02/21/2006.
Does Hidayat Khan, M.D. prescribe more brand-name or generic drugs? ▼
Hidayat Khan, M.D.'s prescribing is 29% brand-name and 71% generic drugs by claim count, with $119K in brand drug costs.
How many Allergy Physician providers are there in the US? ▼
There are 1,015 Allergy Physician providers across 50 states in the US. The average Allergy Physician provider writes 805 Medicare Part D claims per year.
What drugs does Hidayat Khan, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Hidayat Khan, M.D.'s most frequently prescribed drugs include Montelukast Sodium, Azelastine Hcl, Fluticasone Propionate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Hidayat Khan, M.D. accept Medicare? ▼
Hidayat Khan, M.D. appears in CMS Medicare data with 455 Part D claims and 111 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Hidayat Khan, M.D.'s credentials? ▼
Hidayat Khan, M.D.'s NPI is 1386619583 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.