NPI registry status
Active
2026 NPPES data Podiatrist NPI 1861496804 D.P.M.
Verify on CMS → John Callahan, D.P.M.
Podiatrist in Salem, Oregon.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 10,498 in Podiatrist, 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
573
Medicare Part D claims · 209 beneficiaries · Podiatrist avg: 304
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$13.69
1 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
John Callahan, D.P.M. filed 573 Medicare Part D claims in 2023 as a Podiatrist in Salem, Oregon, prescribing 90% generic.
- 573
- Part D claims, 2023
- 90%
- generic prescribing
- $13.69
- industry payments (Sunshine Act)
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.
John Callahan, D.P.M.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
573 Top 34% higher than 66% 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
What does the federal data show about John Callahan, D.P.M.?
Quality data not reportedPrimary specialty
Podiatrist
Medicare Part D claims
573 88% vs specialty avg
Specialty distribution in Oregon
How Podiatrist compares to other specialties among Oregon 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 Podiatrist. 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).
John Callahan, D.P.M. appears in the CMS NPPES registry as a Podiatrist provider holding D.P.M. credentials at 2235 MISSION ST SE, Salem, OR, 97302, with a listed phone of (503) 581-2505. NPI 1861496804 was issued on 06/08/2005.
Medicare Part D records for calendar year 2023 show 573 prescription claims written by this provider, covering 209 Medicare beneficiaries and totaling roughly $15K in drug spend, split 10% brand-name and 90% generic by claim count, with an opioid prescribing rate of 7.0%.
Podiatrist is a mid-sized specialty nationwide, with 10,498 enrolled providers across 54 states and an average of 304 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 | 1861496804 |
|---|---|
| Specialty | Podiatrist |
| Credentials | D.P.M. |
| Gender | Male |
| NPI Issued | 06/08/2005 |
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 John Callahan, D.P.M.. Source: openpaymentsdata.cms.gov.
Total received
$14
Largest payer
DJO, LLC
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 · Typical
John Callahan, D.P.M. - brand share 10.0%
Podiatrist average
10% brand-name claims vs 90% generic, on 573 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.
573
Total Claims
$15K
Total Drug Cost
209
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 806
- Total Day Supply
- 20,334
- Brand vs Generic
- 10% brand / 90% generic
- Brand Drug Cost
- $4K
- Generic Drug Cost
- $11K
- Opioid Claims
- 40 (7.0% rate)
- Antibiotic Claims
- 124
Patient Demographics
- Average Patient Age
- 71.3 years
- Avg HCC Risk Score
- 1.61
- Gender Split
- 52% female / 48% male
- Age Distribution
- <65: 29, 65-74: 103, 75-84: 66, 85+: 11
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What John Callahan, D.P.M. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Pregabalin
Pregabalin
142 claims
- Allopurinol
Allopurinol
68 claims
- Amoxicillin-Clavul…
Amoxicillin-Clavulanate Potass
60 claims
- Terbinafine Hcl 42
Terbinafine Hcl
42 claims
- Gabapentin 40
Gabapentin
40 claims
- Oxycodone Hcl 33
Oxycodone Hcl
33 claims
- Ssd 26
Ssd
26 claims
- Celecoxib 23
Celecoxib
23 claims
| Drug | Claims |
|---|---|
| Pregabalin | 142 |
| Allopurinol | 68 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 60 |
| Terbinafine Hcl | 42 |
| Gabapentin | 40 |
| Oxycodone Hcl | 33 |
| Ssd Silver Sulfadiazine | 26 |
| Celecoxib | 23 |
| Silver Sulfadiazine | 23 |
| Doxycycline Hyclate | 19 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Podiatrist Overview
How John Callahan, D.P.M. fits within the Podiatrist landscape nationally.
10,498
Podiatrist Providers in US
54
States with Podiatrist
304
Avg Claims per Provider
John Callahan, D.P.M.'s 573 claims are above the specialty average of 304.
Nearby Podiatrist Providers in Oregon
Other clinicians with the same primary specialty enrolled in Oregon, drawn from the same CMS NPPES roster as Callahan.
Dr. Dana Alumbaugh
DPM
Hood River, OR
Dr. Hamid Arabshahi
DPM
Salem, OR
Dr. John Barnes
DPM
Portland, OR
Dr. Andrew Baum
DPM
La Grande, OR
Dr. Cara Beach
DPM
Portland, OR
Compare Podiatrist 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 Oregon medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Podiatrist 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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How insurance networks affect your costs
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Frequently Asked Questions
What is John Callahan, D.P.M.'s specialty? ▼
John Callahan, D.P.M. specializes in Podiatrist and practices in Salem, Oregon. Credentials: D.P.M..
How much does John Callahan, D.P.M. prescribe under Medicare Part D? ▼
In 2023, John Callahan, D.P.M. wrote 573 Medicare Part D claims totaling $15K in drug costs for 209 beneficiaries.
Where is John Callahan, D.P.M. located? ▼
John Callahan, D.P.M. is located at 2235 MISSION ST SE, Salem, OR, 97302. Phone: (503) 581-2505.
What is John Callahan, D.P.M.'s NPI number? ▼
John Callahan, D.P.M.'s National Provider Identifier (NPI) is 1861496804, issued on 06/08/2005.
Does John Callahan, D.P.M. prescribe more brand-name or generic drugs? ▼
John Callahan, D.P.M.'s prescribing is 10% brand-name and 90% generic drugs by claim count, with $4K in brand drug costs.
Does John Callahan, D.P.M. prescribe opioids? ▼
Yes, John Callahan, D.P.M. had 40 opioid claims in 2023 with an opioid prescribing rate of 7.0%.
How many Podiatrist providers are there in the US? ▼
There are 10,498 Podiatrist providers across 54 states in the US. The average Podiatrist provider writes 304 Medicare Part D claims per year.
What drugs does John Callahan, D.P.M. prescribe most often? ▼
Based on 2023 Medicare Part D data, John Callahan, D.P.M.'s most frequently prescribed drugs include Pregabalin, Allopurinol, Amoxicillin-Clavulanate Potass. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Callahan, D.P.M. accept Medicare? ▼
John Callahan, D.P.M. appears in CMS Medicare data with 573 Part D claims and 209 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Callahan, D.P.M.'s credentials? ▼
John Callahan, D.P.M.'s NPI is 1861496804 with credentials D.P.M.. 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.