NPI registry status
Active
2026 NPPES data Procedural Dermatology Physician NPI 1356662621 M.D., PH.D.
Verify on CMS → John Selby, M.D., PH.D.
Procedural Dermatology Physician in Iowa City, 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 691 in Procedural Dermatology 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
264
Medicare Part D claims · 57 beneficiaries · Procedural Dermatology Physician avg: 726
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
John Selby, M.D., PH.D. filed 264 Medicare Part D claims in 2024 as a Procedural Dermatology Physician in Iowa City, Iowa, prescribing 86% generic.
- 264
- Part D claims, 2024
- 86%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥48th
- 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 John Selby, M.D., PH.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 1356662621), first enumerated 06/21/2010.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 264 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
- 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 1356662621 · Procedural Dermatology Physician
NPI-10 · ENUM-MID · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1356662621
- ENUM-MID 2010
- TAX-NARROW 691
- RX-LIGHT 264
- BOOK-THIN 6 in Iowa
- PHOTO-ENUM Kathryn Duplantis · 2010
John Selby, M.D., PH.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
264 ≥ 48th percentile 48% 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)
John Selby, M.D., PH.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 John Selby, M.D., PH.D.?
Quality data not reportedPrimary specialty
Procedural Dermatology Physician
Medicare Part D claims
264 64% vs specialty avg
Specialty distribution in Iowa
How Procedural Dermatology 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 Procedural Dermatology 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 | 1356662621 |
|---|---|
| Specialty | Procedural Dermatology Physician |
| Credentials | M.D., PH.D. |
| Gender | Male |
| NPI Issued | 06/21/2010 |
Hospital and facility affiliations
Facilities where John Selby, M.D., PH.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.
State University OF Iowa
Coralville, IA
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
John Selby, M.D., PH.D. - brand share 14.0%
Procedural Dermatology Physician average
14% brand-name claims vs 86% generic, on 264 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.
264
Total Claims
$176K
Total Drug Cost
57
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 323.133
- Total Day Supply
- 9,233
- Brand vs Generic
- 14% brand / 86% generic
- Brand Drug Cost
- $164K
- Generic Drug Cost
- $12K
- Antibiotic Claims
- 19
Patient Demographics
- Average Patient Age
- 71.4 years
- Avg HCC Risk Score
- 1.30
- Gender Split
- 56% female / 44% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What John Selby, M.D., PH.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Ketoconazole
Ketoconazole
23 claims
- Clobetasol Propion…
Clobetasol Propionate
21 claims
- Doxycycline Hyclate
Doxycycline Hyclate
18 claims
- Fluorouracil
Fluorouracil
15 claims
- Metronidazole
Metronidazole
12 claims
- Spironolactone
Spironolactone
12 claims
- Glycopyrrolate
Glycopyrrolate
11 claims
- Minoxidil
Minoxidil
11 claims
| Drug | Claims |
|---|---|
| Ketoconazole | 23 |
| Clobetasol Propionate | 21 |
| Doxycycline Hyclate | 18 |
| Fluorouracil | 15 |
| Metronidazole | 12 |
| Spironolactone | 12 |
| Glycopyrrolate | 11 |
| Minoxidil | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Procedural Dermatology Physician Overview
How John Selby, M.D., PH.D. fits within the Procedural Dermatology Physician landscape nationally.
691
Procedural Dermatology Physician Providers in US
49
States with Procedural Dermatology Physician
726
Avg Claims per Provider
John Selby, M.D., PH.D.'s 264 claims are below the specialty average of 726.
Nationwide Procedural Dermatology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Selby, both outside Iowa so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2010)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Procedural Dermatology Physician Providers in Iowa
Other clinicians with the same primary specialty enrolled in Iowa, drawn from the same CMS NPPES roster as Selby.
One of 6 Procedural Dermatology Physician providers enrolled in Iowa, 5 are shown here.
Dr. Timothy Abrahamson
M.D.
Urbandale, IA
Dr. Jennifer Hutchinson
DNP, ARNP
West Union, IA
Dr. Matthew Landherr
M.D.
Cedar Rapids, IA
Dr. Michael Messingham
MD
Iowa City, IA
Dr. Susan Wall
M.D.
Iowa City, IA
Compare Procedural Dermatology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is John Selby, M.D., PH.D.'s specialty? ▼
John Selby, M.D., PH.D. specializes in Procedural Dermatology Physician and practices in Iowa City, Iowa. Credentials: M.D., PH.D..
How much does John Selby, M.D., PH.D. prescribe under Medicare Part D? ▼
In 2024, John Selby, M.D., PH.D. wrote 264 Medicare Part D claims totaling $176K in drug costs for 57 beneficiaries.
Where is John Selby, M.D., PH.D. located? ▼
John Selby, M.D., PH.D. is located at 200 HAWKINS DR, Iowa City, IA, 52242. Phone: (319) 356-7546.
What is John Selby, M.D., PH.D.'s NPI number? ▼
John Selby, M.D., PH.D.'s National Provider Identifier (NPI) is 1356662621, issued on 06/21/2010.
Does John Selby, M.D., PH.D. prescribe more brand-name or generic drugs? ▼
John Selby, M.D., PH.D.'s prescribing is 14% brand-name and 86% generic drugs by claim count, with $164K in brand drug costs.
How many Procedural Dermatology Physician providers are there in the US? ▼
There are 691 Procedural Dermatology Physician providers across 49 states in the US. The average Procedural Dermatology Physician provider writes 726 Medicare Part D claims per year.
What drugs does John Selby, M.D., PH.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, John Selby, M.D., PH.D.'s most frequently prescribed drugs include Ketoconazole, Clobetasol Propionate, Doxycycline Hyclate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Selby, M.D., PH.D. accept Medicare? ▼
John Selby, M.D., PH.D. appears in CMS Medicare data with 264 Part D claims and 57 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Selby, M.D., PH.D.'s credentials? ▼
John Selby, M.D., PH.D.'s NPI is 1356662621 with credentials M.D., PH.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.