2026 NPPES data Allergy & Immunology Physician NPI 1548231400 M.D.
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GLEN NADEL, M.D.

Allergy & Immunology Physician in ATLANTA, Georgia. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
977
Medicare Part D claims · 220 beneficiaries · Allergy & Immunology Physician avg: 764
Generic prescribing
47%
generic claims · 53% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.9K
104 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: GLEN NADEL, M.D. is a Allergy & Immunology Physician ([object Object]) practicing in ATLANTA, Georgia with a Medicare Part D prescribing footprint of 977 claims across 220 beneficiaries — 53% brand-name prescribing . Industry payments of $1.9K across 104 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: GLEN NADEL, M.D. filed 977 Medicare Part D claims in 2023 across ATLANTA, Georgia. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

GLEN NADEL, M.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).

GLEN NADEL, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 01/30/2006

NPI 1548231400

Primary specialty

Allergy & Immunology Physician

Niche

3,390 US NPIs in this specialty

Medicare Part D claims

977 28% vs specialty avg

2023 prescription claims

Specialty avg: 764

Specialty distribution in Georgia

How Allergy & Immunology Physician compares to other specialties among Georgia providers

Georgia providers

Allergy & Immunology Physician share within Georgia

1. Allergy & Immunology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Allergy & Immunology Physician share within Georgia

Specialty board-certification context

Estimated specialty board-certified rate — Allergy & Immunology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Allergy & Immunology Physician ABMS/AOA estimate

Est. board-certified rate (Allergy & Immunology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Allergy & Immunology Physician) — ABMS / AOA estimate

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).

GLEN NADEL, M.D. is a Allergy & Immunology Physician provider practicing in ATLANTA, Georgia, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1548231400. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

GLEN NADEL, M.D. appears in the CMS NPPES registry as a Allergy & Immunology Physician provider holding M.D. credentials at 5555 PEACHTREE DUNWOODY RD NE, ATLANTA, GA, 30342, with a listed phone of (404) 255-9286. NPI 1548231400 was issued on 01/30/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what NADEL most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 977 prescription claims written by this provider, covering 220 Medicare beneficiaries and totaling roughly $376K in drug spend, split 53% brand-name and 47% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Allergy & Immunology Physician is a narrow specialty nationwide, with 3,390 enrolled providers across 52 states and an average of 764 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

5555 PEACHTREE DUNWOODY RD NE
ATLANTA, GA 30342

Provider Details

NPI 1548231400
Specialty Allergy & Immunology Physician
Credentials M.D.
Gender Male
NPI Issued 01/30/2006

Hospital and facility affiliations

Facilities where GLEN NADEL, 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.

ALLERGY AND ASTHMA CONSULTANTS, P.C.
ROSWELL, 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 GLEN NADEL, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$1.9K

Largest payer

GENZYME CORPORATION

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 · Brand-heavy

GLEN NADEL, M.D. — brand share 53.0%
Specialty average (est.)

53% brand-name claims vs 47% generic, on 977 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.

977
Total Claims
$376K
Total Drug Cost
220
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,543
Total Day Supply
43,158
Brand vs Generic
53% brand / 47% generic
Brand Drug Cost
$356K
Antibiotic Claims
42

Patient Demographics

Average Patient Age
72.7 years
Avg HCC Risk Score
0.97
Gender Split
72% female / 28% male
Age Distribution
<65: 17, 65-74: 106, 75-84: 81, 85+: 16

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Trelegy Ellipta
Fluticasone/Umeclidin/Vilanter
160
Montelukast Sodium
112
Albuterol Sulfate Hfa
Albuterol Sulfate
81
Symbicort
Budesonide/Formoterol Fumarate
78
Breo Ellipta
Fluticasone/Vilanterol
69
Azelastine Hcl
65
Ipratropium Bromide
54
Breztri Aerosphere
Budesonide/Glycopyr/Formoterol
25
Famotidine
22
Fluticasone Propionate
21

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Allergy & Immunology Physician Overview

How GLEN NADEL, M.D. fits within the Allergy & Immunology Physician landscape nationally.

3,390
Allergy & Immunology Physician Providers in US
52
States with Allergy & Immunology Physician
764
Avg Claims per Provider

GLEN NADEL, M.D.'s 977 claims are above the specialty average of 764.

Nearby Allergy & Immunology Physician Providers in Georgia

Other clinicians with the same primary specialty enrolled in Georgia, drawn from the same CMS NPPES roster as NADEL.

Compare Allergy & Immunology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is GLEN NADEL, M.D.'s specialty?
GLEN NADEL, M.D. specializes in Allergy & Immunology Physician and practices in ATLANTA, Georgia. Credentials: M.D..
How much does GLEN NADEL, M.D. prescribe under Medicare Part D?
In 2023, GLEN NADEL, M.D. wrote 977 Medicare Part D claims totaling $376K in drug costs for 220 beneficiaries.
Where is GLEN NADEL, M.D. located?
GLEN NADEL, M.D. is located at 5555 PEACHTREE DUNWOODY RD NE, ATLANTA, GA, 30342. Phone: (404) 255-9286.
What is GLEN NADEL, M.D.'s NPI number?
GLEN NADEL, M.D.'s National Provider Identifier (NPI) is 1548231400, issued on 01/30/2006.
Does GLEN NADEL, M.D. prescribe more brand-name or generic drugs?
GLEN NADEL, M.D.'s prescribing is 53% brand-name and 47% generic drugs by claim count, with $356K in brand drug costs.
How many Allergy & Immunology Physician providers are there in the US?
There are 3,390 Allergy & Immunology Physician providers across 52 states in the US. The average Allergy & Immunology Physician provider writes 764 Medicare Part D claims per year.
What drugs does GLEN NADEL, M.D. prescribe most often?
Based on 2023 Medicare Part D data, GLEN NADEL, M.D.'s most frequently prescribed drugs include Trelegy Ellipta, Montelukast Sodium, Albuterol Sulfate Hfa. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does GLEN NADEL, M.D. accept Medicare?
GLEN NADEL, M.D. appears in CMS Medicare data with 977 Part D claims and 220 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify GLEN NADEL, M.D.'s credentials?
GLEN NADEL, M.D.'s NPI is 1548231400 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

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