NPI registry status
Active
2026 NPPES data Pulmonary Disease Physician NPI 1598761223 M.D.
Verify on CMS → Daniel Callahan, M.D.
Pulmonary Disease Physician in Alpharetta, Georgia.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 9,323 in Pulmonary Disease 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
2K
Medicare Part D claims · 358 beneficiaries · Pulmonary Disease Physician avg: 1K
MIPS score
65.4/100
▼ 18 pts below national avg 83.5 · Mid-tier
Industry payments
$1.8K
83 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Daniel Callahan, M.D. reported a CMS MIPS final score of 65.4/100 - below the 83.5 national average - and filed 2,029 Medicare Part D claims in 2023.
- 65.4/100
- MIPS score · -18 vs avg
- 2K
- Part D claims, 2023
- Likely
- board-certified (heuristic)
- ≥7th
- pct among measured MIPS (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.
Daniel Callahan, M.D.'s MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
65 ≥ 7th percentile 7% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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 whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Daniel Callahan, M.D. sits
This provider among pulmonary disease physician peers
Across the 2,467 pulmonary disease physician providers who report both Medicare Part D prescribing and a MIPS quality score, Daniel Callahan, M.D. writes more Part D claims than 72% of them and scores higher on MIPS quality than 10% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one pulmonary disease physician peer from a representative sample of 60; the gold marker is Daniel Callahan, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Daniel Callahan, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 Daniel Callahan, M.D.?
Below national averagePrimary specialty
Pulmonary Disease Physician
Medicare Part D claims
2,029 39% vs specialty avg
MIPS final score
65.4/100 18.1 pts vs avg
Specialty distribution in Georgia
How Pulmonary Disease Physician compares to other specialties among Georgia providers
Medicare quality performance, MIPS
Daniel Callahan, M.D.'s 2023 MIPS final score plotted against the Pulmonary Disease Physician national average
- MIPS Final Score
- 65.4/100
- vs 83.5 national avg · 2023 performance year
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).
Daniel Callahan, M.D. appears in the CMS NPPES registry as a Pulmonary Disease Physician provider holding M.D. credentials at 3400 OLD MILTON PKWY # C, Alpharetta, GA, 30005, with a listed phone of (770) 343-8760. NPI 1598761223 was issued on 06/27/2005.
Medicare Part D records for calendar year 2023 show 2,029 prescription claims written by this provider, covering 358 Medicare beneficiaries and totaling roughly $876K in drug spend. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 65.4/100 for the 2023 performance year (Quality 64.5, Cost 49.8), compared with the 83.5 average among clinicians with a measured score.
Pulmonary Disease Physician is a mid-sized specialty nationwide, with 9,323 enrolled providers across 53 states and an average of 1,457 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 | 1598761223 |
|---|---|
| Specialty | Pulmonary Disease Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 06/27/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
65.4124
Final Score
Measured-score avg: 83.5
64.4695
Quality
49.8474
Cost
Reporting: Individual
Hospital and facility affiliations
Facilities where Daniel Callahan, M.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.
Northside Primary Care Professional Services,llc
Alpharetta, GA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Daniel Callahan, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$1.8K
Largest payer
GlaxoSmithKline, 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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
2,029
Total Claims
$876K
Total Drug Cost
358
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,803
- Total Day Supply
- 74,927
- Generic Drug Cost
- $27K
- Antibiotic Claims
- 253
Patient Demographics
- Average Patient Age
- 75.8 years
- Avg HCC Risk Score
- 1.72
- Gender Split
- 54% female / 46% male
- Age Distribution
- <65: 15, 65-74: 139, 75-84: 162, 85+: 42
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Daniel Callahan, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Trelegy Ellipta
Trelegy Ellipta
192 claims
- Prednisone
Prednisone
172 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
127 claims
- Montelukast Sodium
Montelukast Sodium
121 claims
- Azithromycin
Azithromycin
103 claims
- Trazodone Hcl
Trazodone Hcl
86 claims
- Symbicort
Symbicort
80 claims
- Breo Ellipta 60
Breo Ellipta
60 claims
| Drug | Claims |
|---|---|
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 192 |
| Prednisone | 172 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 127 |
| Montelukast Sodium | 121 |
| Azithromycin | 103 |
| Trazodone Hcl | 86 |
| Symbicort Budesonide/Formoterol Fumarate | 80 |
| Breo Ellipta Fluticasone/Vilanterol | 60 |
| Cefuroxime Cefuroxime Axetil | 58 |
| Stiolto Respimat Tiotropium Br/Olodaterol Hcl | 55 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Pulmonary Disease Physician Overview
How Daniel Callahan, M.D. fits within the Pulmonary Disease Physician landscape nationally.
9,323
Pulmonary Disease Physician Providers in US
53
States with Pulmonary Disease Physician
1,457
Avg Claims per Provider
Daniel Callahan, M.D.'s 2,029 claims are above the specialty average of 1,457.
Nearby Pulmonary Disease Physician Providers in Georgia
Other clinicians with the same primary specialty enrolled in Georgia, drawn from the same CMS NPPES roster as Callahan.
One of 256 Pulmonary Disease Physician providers enrolled in Georgia, 5 are shown here.
Dr. Israel Acosta Sanchez
M.D.
Augusta, GA
Dr. Samuel Aguayo
M.D.
Decatur, GA
Dr. Masood Ahmed
M. D.
Savannah, GA
Dr. Sisir Akkineni
M.D.
Atlanta, GA
Dr. Igor Aksenov
M.D.
Savannah, GA
Compare Pulmonary Disease Physician 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 Georgia medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Pulmonary Disease Physician 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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Frequently Asked Questions
What is Daniel Callahan, M.D.'s specialty? ▼
Daniel Callahan, M.D. specializes in Pulmonary Disease Physician and practices in Alpharetta, Georgia. Credentials: M.D..
How much does Daniel Callahan, M.D. prescribe under Medicare Part D? ▼
In 2023, Daniel Callahan, M.D. wrote 2,029 Medicare Part D claims totaling $876K in drug costs for 358 beneficiaries.
What is Daniel Callahan, M.D.'s Medicare quality score? ▼
Daniel Callahan, M.D. has a CMS MIPS Final Score of 65.4/100 (Quality: 64.5, Cost: 49.8). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Daniel Callahan, M.D. located? ▼
Daniel Callahan, M.D. is located at 3400 OLD MILTON PKWY # C, Alpharetta, GA, 30005. Phone: (770) 343-8760.
What is Daniel Callahan, M.D.'s NPI number? ▼
Daniel Callahan, M.D.'s National Provider Identifier (NPI) is 1598761223, issued on 06/27/2005.
How many Pulmonary Disease Physician providers are there in the US? ▼
There are 9,323 Pulmonary Disease Physician providers across 53 states in the US. The average Pulmonary Disease Physician provider writes 1,457 Medicare Part D claims per year.
What drugs does Daniel Callahan, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Daniel Callahan, M.D.'s most frequently prescribed drugs include Trelegy Ellipta, Prednisone, Albuterol Sulfate Hfa. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Daniel Callahan, M.D. accept Medicare? ▼
Daniel Callahan, M.D. appears in CMS Medicare data with 2,029 Part D claims and 358 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Daniel Callahan, M.D.'s credentials? ▼
Daniel Callahan, M.D.'s NPI is 1598761223 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.