NPI registry status
Active
2026 NPPES data Pediatric Pulmonology Physician NPI 1295823557 DO
Verify on CMS → Charles Callahan, DO
Pediatric Pulmonology Physician in Washington, District of Columbia.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,059 in Pediatric Pulmonology 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.
What the federal data shows
Charles Callahan, DO is a Pediatric Pulmonology Physician in Washington, District of Columbia, listed in the federal CMS National Provider Identifier registry.
- #138
- Pediatric Pulmonology Physician rank among District of Columbia specialties
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 1295823557 · Pediatric Pulmonology Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-NONE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1295823557
- ENUM-LEGACY 2006
- TAX-NARROW 1,059
- RX-NONE No Part D
- BOOK-THIN 21 in District of Columbia
- PHOTO-ENUM Samuel Moskowitz · 2006
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Board-eligible specialty (heuristic, not verified)
Charles Callahan, DO 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 Charles Callahan, DO?
Quality data not reportedPrimary specialty
Pediatric Pulmonology Physician
Specialty distribution in District of Columbia
How Pediatric Pulmonology Physician compares to other specialties among District of Columbia 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 Pediatric Pulmonology 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 | 1295823557 |
|---|---|
| Specialty | Pediatric Pulmonology Physician |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 10/11/2006 |
More Pediatric Pulmonology Physician in DC →
All providers in District of Columbia →
Compare specialties →
Pediatric Pulmonology Physician Overview
How Charles Callahan, DO fits within the Pediatric Pulmonology Physician landscape nationally.
1,059
Pediatric Pulmonology Physician Providers in US
51
States with Pediatric Pulmonology Physician
130
Avg Claims per Provider
Nationwide Pediatric Pulmonology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Callahan, both outside District of Columbia 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 Pediatric Pulmonology Physician Providers in District of Columbia
Other clinicians with the same primary specialty enrolled in District of Columbia, drawn from the same CMS NPPES roster as Callahan.
One of 21 Pediatric Pulmonology Physician providers enrolled in District of Columbia, 5 are shown here.
Dr. Maria Arroyo-Morr
M.D.
Washington, DC
Dr. Raja Mounika Balusu
M.D.
Washington, DC
Dr. Maria Bautista
MD
Washington, DC
Dr. Hollis Chaney
MD
Washington, DC
Dr. Cynthia George
FNP
Washington, DC
Compare Pediatric Pulmonology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Charles Callahan, DO's specialty? ▼
Charles Callahan, DO specializes in Pediatric Pulmonology Physician and practices in Washington, District of Columbia. Credentials: DO.
Where is Charles Callahan, DO located? ▼
Charles Callahan, DO is located at WALTER REED ARMY MEDICAL CENTER, Washington, DC, 20907. Phone: (202) 782-8397.
What is Charles Callahan, DO's NPI number? ▼
Charles Callahan, DO's National Provider Identifier (NPI) is 1295823557, issued on 10/11/2006.
How many Pediatric Pulmonology Physician providers are there in the US? ▼
There are 1,059 Pediatric Pulmonology Physician providers across 51 states in the US. The average Pediatric Pulmonology Physician provider writes 130 Medicare Part D claims per year.
Does Charles Callahan, DO accept Medicare? ▼
Charles Callahan, DO appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Charles Callahan, DO's credentials? ▼
Charles Callahan, DO's NPI is 1295823557 with credentials DO. 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.
- 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.