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 10,602 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
627
Medicare Part D claims · 230 beneficiaries · Podiatrist avg: 320
Generic prescribing
91%
generic claims · 9% 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, 2024
What the federal data shows
John Callahan, D.P.M. filed 627 Medicare Part D claims in 2024 as a Podiatrist in Salem, Oregon, prescribing 91% generic.
- 627
- Part D claims, 2024
- 91%
- generic prescribing
- $13.69
- industry payments (Sunshine Act)
- ≥68th
- 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 Callahan, D.P.M.
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 1861496804), first enumerated 06/08/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 627 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Industry payment transparency
$13.69 in reported industry payments (1 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 1861496804 · Podiatrist
NPI-10 · ENUM-LEGACY · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1861496804
- ENUM-LEGACY 2005
- TAX-MID 11K Podiatrist
- RX-LIGHT 627
- BOOK-THIN 112 in Oregon
- PHOTO-ENUM Charles Ganime · 2005
John Callahan, D.P.M.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
627 ≥ 68th percentile 68% 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
What does the federal data show about John Callahan, D.P.M.?
Quality data not reportedPrimary specialty
Podiatrist
Medicare Part D claims
627 96% 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).
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 · Generic-heavy
John Callahan, D.P.M. - brand share 9.0%
Podiatrist average
9% brand-name claims vs 91% generic, on 627 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.
627
Total Claims
$24K
Total Drug Cost
230
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 823.833
- Total Day Supply
- 20,923
- Brand vs Generic
- 9% brand / 91% generic
- Brand Drug Cost
- $14K
- Generic Drug Cost
- $10K
- Opioid Claims
- 38 (6.1% rate)
- Antibiotic Claims
- 103
Patient Demographics
- Average Patient Age
- 71.3 years
- Avg HCC Risk Score
- 1.39
- Gender Split
- 54% female / 46% male
- Age Distribution
- <65: 42, 65-74: 96, 75-84: 76, 85+: 16
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What John Callahan, D.P.M. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Pregabalin
Pregabalin
175 claims
- Amoxicillin-Clavul… 53
Amoxicillin-Clavulanate Potass
53 claims
- Gabapentin 52
Gabapentin
52 claims
- Terbinafine Hcl 52
Terbinafine Hcl
52 claims
- Meloxicam 44
Meloxicam
44 claims
- Oxycodone Hcl 36
Oxycodone Hcl
36 claims
- Allopurinol 28
Allopurinol
28 claims
- Ssd 24
Ssd
24 claims
| Drug | Claims |
|---|---|
| Pregabalin | 175 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 53 |
| Gabapentin | 52 |
| Terbinafine Hcl | 52 |
| Meloxicam | 44 |
| Oxycodone Hcl | 36 |
| Allopurinol | 28 |
| Ssd Silver Sulfadiazine | 24 |
| Silver Sulfadiazine | 19 |
| Clindamycin Hcl | 17 |
* 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.
10,602
Podiatrist Providers in US
54
States with Podiatrist
320
Avg Claims per Provider
John Callahan, D.P.M.'s 627 claims are above the specialty average of 320.
Nationwide Podiatrist peers with similar MIPS or enrollment year
Two federal-record peer sets for Callahan, both outside Oregon so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Podiatrist Providers in Oregon
Other clinicians with the same primary specialty enrolled in Oregon, drawn from the same CMS NPPES roster as Callahan.
One of 112 Podiatrist providers enrolled in Oregon, 5 are shown here.
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 →
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 2024, John Callahan, D.P.M. wrote 627 Medicare Part D claims totaling $24K in drug costs for 230 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 9% brand-name and 91% generic drugs by claim count, with $14K in brand drug costs.
Does John Callahan, D.P.M. prescribe opioids? ▼
Yes, John Callahan, D.P.M. had 38 opioid claims in 2024 with an opioid prescribing rate of 6.1%.
How many Podiatrist providers are there in the US? ▼
There are 10,602 Podiatrist providers across 54 states in the US. The average Podiatrist provider writes 320 Medicare Part D claims per year.
What drugs does John Callahan, D.P.M. prescribe most often? ▼
Based on 2024 Medicare Part D data, John Callahan, D.P.M.'s most frequently prescribed drugs include Pregabalin, Amoxicillin-Clavulanate Potass, Gabapentin. 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 627 Part D claims and 230 Medicare beneficiaries in 2024. 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 (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.