NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1518055847 M.D.
Verify on CMS → Donald Bumgarner, M.D.
Family Medicine Physician in Shenandoah, Iowa.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 147,760 in Family Medicine 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
5K
Medicare Part D claims · 202 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Donald Bumgarner, M.D. filed 4,564 Medicare Part D claims in 2023 as a Family Medicine Physician in Shenandoah, Iowa, prescribing 88% generic.
- 5K
- Part D claims, 2023
- 88%
- generic prescribing
- ≥93rd
- 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.
CMS NPPES provider registry desk
NPI 1518055847 · Family Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-MID · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1518055847
- ENUM-LEGACY 2006
- TAX-MEGA 148K Family Medicine
- RX-MID 4,564
- BOOK-LIGHT 2,267 in Iowa
- PHOTO-ENUM James Bartay · 2006
Donald Bumgarner, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
4,564 ≥ 93rd percentile 93% of 1,370,886 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 · 2023
◑
Board-eligible specialty (heuristic, not verified)
Donald Bumgarner, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Donald Bumgarner, M.D.?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
4,564 34% vs specialty avg
Specialty distribution in Iowa
How Family Medicine Physician compares to other specialties among Iowa 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 Family Medicine 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 | 1518055847 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 10/11/2006 |
Brand vs generic prescribing mix · Typical
Donald Bumgarner, M.D. - brand share 12.0%
Family Medicine Physician average
12% brand-name claims vs 88% generic, on 4,564 2023 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 2023.
4,564
Total Claims
$310K
Total Drug Cost
202
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 8,709
- Total Day Supply
- 251,659
- Brand vs Generic
- 12% brand / 88% generic
- Brand Drug Cost
- $242K
- Generic Drug Cost
- $65K
- Opioid Claims
- 129 (2.8% rate)
- Antibiotic Claims
- 69
Patient Demographics
- Average Patient Age
- 75.2 years
- Avg HCC Risk Score
- 1.19
- Gender Split
- 42% female / 58% male
- Age Distribution
- <65: 18, 65-74: 82, 75-84: 62, 85+: 40
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Donald Bumgarner, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Amlodipine Besylate
Amlodipine Besylate
281 claims
- Atorvastatin Calcium
Atorvastatin Calcium
265 claims
- Lisinopril
Lisinopril
204 claims
- Levothyroxine Sodium
Levothyroxine Sodium
184 claims
- Metoprolol Tartrate
Metoprolol Tartrate
158 claims
- Warfarin Sodium
Warfarin Sodium
143 claims
- Potassium Chloride
Potassium Chloride
126 claims
- Furosemide
Furosemide
122 claims
| Drug | Claims |
|---|---|
| Amlodipine Besylate | 281 |
| Atorvastatin Calcium | 265 |
| Lisinopril | 204 |
| Levothyroxine Sodium | 184 |
| Metoprolol Tartrate | 158 |
| Warfarin Sodium | 143 |
| Potassium Chloride | 126 |
| Furosemide | 122 |
| Metformin Hcl | 106 |
| Losartan Potassium | 104 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How Donald Bumgarner, M.D. fits within the Family Medicine Physician landscape nationally.
147,760
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider
Donald Bumgarner, M.D.'s 4,564 claims are above the specialty average of 3,418.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Bumgarner, both outside Iowa 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 Family Medicine Physician Providers in Iowa
Other clinicians with the same primary specialty enrolled in Iowa, drawn from the same CMS NPPES roster as Bumgarner.
One of 2,267 Family Medicine Physician providers enrolled in Iowa, 5 are shown here.
Dr. Jennifer Aanestad
M.D.
Durant, IA
Dr. Amjad Abdelhady
MD
Sioux City, IA
Dr. Afsana Abdullah
D.O.
Bettendorf, IA
Dr. Raja Ali Abdullah
MD
Cedar Falls, IA
Dr. Laura Abels
DO
Ankeny, IA
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Donald Bumgarner, M.D.'s specialty? ▼
Donald Bumgarner, M.D. specializes in Family Medicine Physician and practices in Shenandoah, Iowa. Credentials: M.D..
How much does Donald Bumgarner, M.D. prescribe under Medicare Part D? ▼
In 2023, Donald Bumgarner, M.D. wrote 4,564 Medicare Part D claims totaling $310K in drug costs for 202 beneficiaries.
Where is Donald Bumgarner, M.D. located? ▼
Donald Bumgarner, M.D. is located at 1 JACK FOSTER DR, Shenandoah, IA, 51601. Phone: (712) 246-7400.
What is Donald Bumgarner, M.D.'s NPI number? ▼
Donald Bumgarner, M.D.'s National Provider Identifier (NPI) is 1518055847, issued on 10/11/2006.
Does Donald Bumgarner, M.D. prescribe more brand-name or generic drugs? ▼
Donald Bumgarner, M.D.'s prescribing is 12% brand-name and 88% generic drugs by claim count, with $242K in brand drug costs.
Does Donald Bumgarner, M.D. prescribe opioids? ▼
Yes, Donald Bumgarner, M.D. had 129 opioid claims in 2023 with an opioid prescribing rate of 2.8%.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,760 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does Donald Bumgarner, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Donald Bumgarner, M.D.'s most frequently prescribed drugs include Amlodipine Besylate, Atorvastatin Calcium, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Donald Bumgarner, M.D. accept Medicare? ▼
Donald Bumgarner, M.D. appears in CMS Medicare data with 4,564 Part D claims and 202 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Donald Bumgarner, M.D.'s credentials? ▼
Donald Bumgarner, M.D.'s NPI is 1518055847 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 (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
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 May 2026.