NPI registry status
Active
2026 NPPES data Allergy & Immunology Physician NPI 1598747826 MD
Verify on CMS → William Culver, MD
Allergy & Immunology Physician in Fort Collins, Colorado.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 3,390 in Allergy & Immunology 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
1K
Medicare Part D claims · 170 beneficiaries · Allergy & Immunology Physician avg: 764
Industry payments
$1.9K
96 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
William Culver, MD filed 1,020 Medicare Part D claims in 2023 as a Allergy & Immunology Physician in Fort Collins, Colorado.
- 1K
- Part D claims, 2023
- 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.
William Culver, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,020 Top 24% higher than 76% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
William Culver, MD 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 William Culver, MD?
Quality data not reportedPrimary specialty
Allergy & Immunology Physician
Medicare Part D claims
1,020 34% vs specialty avg
Specialty distribution in Colorado
How Allergy & Immunology Physician compares to other specialties among Colorado 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 & Immunology 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).
William Culver, MD appears in the CMS NPPES registry as a Allergy & Immunology Physician provider holding MD credentials at 2121 E HARMONY RD UNIT 290, Fort Collins, CO, 80528, with a listed phone of (970) 221-2370. NPI 1598747826 was issued on 11/14/2005.
Medicare Part D records for calendar year 2023 show 1,020 prescription claims written by this provider, covering 170 Medicare beneficiaries and totaling roughly $566K in drug spend, with an opioid prescribing rate of 2.0%.
Allergy & Immunology Physician is a narrow specialty nationwide, with 3,390 enrolled providers across 52 states and an average of 764 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1598747826 |
|---|---|
| Specialty | Allergy & Immunology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 11/14/2005 |
Hospital and facility affiliations
Facilities where William Culver, 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.
Allergy Partners OF Colorado, PC
Fort Collins, CO
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 William Culver, MD. Source: openpaymentsdata.cms.gov.
Total received
$1.9K
Largest payer
AstraZeneca Pharmaceuticals LP
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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
1,020
Total Claims
$566K
Total Drug Cost
170
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,697
- Total Day Supply
- 47,749
- Generic Drug Cost
- $28K
- Opioid Claims
- 20 (2.0% rate)
- Antibiotic Claims
- 29
Patient Demographics
- Average Patient Age
- 72.9 years
- Avg HCC Risk Score
- 1.09
- Gender Split
- 72% female / 28% male
- Age Distribution
- <65: 15, 65-74: 85, 75-84: 53, 85+: 17
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What William Culver, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Montelukast Sodium
Montelukast Sodium
173 claims
- Symbicort
Symbicort
97 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
78 claims
- Azelastine Hcl 45
Azelastine Hcl
45 claims
- Prednisone 44
Prednisone
44 claims
- Hizentra 39
Hizentra
39 claims
- Ipratropium Bromide 37
Ipratropium Bromide
37 claims
- Dupixent Syringe 34
Dupixent Syringe
34 claims
| Drug | Claims |
|---|---|
| Montelukast Sodium | 173 |
| Symbicort Budesonide/Formoterol Fumarate | 97 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 78 |
| Azelastine Hcl | 45 |
| Prednisone | 44 |
| Hizentra Immun Glob G(Igg)/Pro/Iga 0-50 | 39 |
| Ipratropium Bromide | 37 |
| Dupixent Syringe Dupilumab | 34 |
| Hydroxyzine Hcl | 34 |
| Breo Ellipta Fluticasone/Vilanterol | 30 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Allergy & Immunology Physician Overview
How William Culver, MD fits within the Allergy & Immunology Physician landscape nationally.
3,390
Allergy & Immunology Physician Providers in US
52
States with Allergy & Immunology Physician
764
Avg Claims per Provider
William Culver, MD's 1,020 claims are above the specialty average of 764.
Nearby Allergy & Immunology Physician Providers in Colorado
Other clinicians with the same primary specialty enrolled in Colorado, drawn from the same CMS NPPES roster as Culver.
Dr. Rafeul Alam
MD
Denver, CO
Dr. Erik Anderson
PHD, DO
Fort Collins, CO
Dr. Francine Andrews
M. D.
Lakewood, CO
Dr. Jatinder Aulakh
MD
Lafayette, CO
Dr. Sanford Avner
M.D.
Lone Tree, CO
Compare Allergy & Immunology Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Colorado medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Allergy & Immunology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is William Culver, MD's specialty? ▼
William Culver, MD specializes in Allergy & Immunology Physician and practices in Fort Collins, Colorado. Credentials: MD.
How much does William Culver, MD prescribe under Medicare Part D? ▼
In 2023, William Culver, MD wrote 1,020 Medicare Part D claims totaling $566K in drug costs for 170 beneficiaries.
Where is William Culver, MD located? ▼
William Culver, MD is located at 2121 E HARMONY RD UNIT 290, Fort Collins, CO, 80528. Phone: (970) 221-2370.
What is William Culver, MD's NPI number? ▼
William Culver, MD's National Provider Identifier (NPI) is 1598747826, issued on 11/14/2005.
Does William Culver, MD prescribe opioids? ▼
Yes, William Culver, MD had 20 opioid claims in 2023 with an opioid prescribing rate of 2.0%.
How many Allergy & Immunology Physician providers are there in the US? ▼
There are 3,390 Allergy & Immunology Physician providers across 52 states in the US. The average Allergy & Immunology Physician provider writes 764 Medicare Part D claims per year.
What drugs does William Culver, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, William Culver, MD's most frequently prescribed drugs include Montelukast Sodium, Symbicort, Albuterol Sulfate Hfa. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Culver, MD accept Medicare? ▼
William Culver, MD appears in CMS Medicare data with 1,020 Part D claims and 170 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Culver, MD's credentials? ▼
William Culver, MD's NPI is 1598747826 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 (2023). 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 April 2026 (NPPES) / 2023 (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
Compiled from official public sources by the PlainDoctor editorial team.