2026 NPPES data Endocrinology, Diabetes & Metabolism Physician NPI 1841258738 MD
Verify on CMS →

ADAM MAASS, MD

Endocrinology, Diabetes & Metabolism Physician in SPRINGDALE, Arkansas. 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
350
Medicare Part D claims · 60 beneficiaries · Endocrinology, Diabetes & Metabolism Physician avg: 3K

What the federal data shows

ADAM MAASS, MD filed 350 Medicare Part D claims in 2023 as a Endocrinology, Diabetes & Metabolism Physician in SPRINGDALE, Arkansas.

350
Part D claims, 2023

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.

ADAM MAASS, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

350 Top 43% higher than 57% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). This entry sits in this band. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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

Board-eligible specialty (heuristic — not verified)

ADAM MAASS, MD 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 ADAM MAASS, MD?

Quality data not reported

NPI registry status

Active

Issued 05/02/2006

NPI 1841258738

Primary specialty

Endocrinology, Diabetes & Metabolism Physician

Mid-sized

7,852 US NPIs in this specialty

Medicare Part D claims

350 87% vs specialty avg

2023 prescription claims

Specialty avg: 2,639

Specialty distribution in Arkansas

How Endocrinology, Diabetes & Metabolism Physician compares to other specialties among Arkansas providers

Arkansas providers

Endocrinology, Diabetes & Metabolism Physician share within Arkansas

1. Endocrinology, Diabetes & Metabolism Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Endocrinology, Diabetes & Metabolism Physician share within Arkansas

Specialty board-certification context

Estimated specialty board-certified rate — Endocrinology, Diabetes & Metabolism Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Endocrinology, Diabetes & Metabolism Physician ABMS/AOA estimate

Est. board-certified rate (Endocrinology, Diabetes & Metabolism Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Endocrinology, Diabetes & Metabolism 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).

ADAM MAASS, MD appears in the CMS NPPES registry as a Endocrinology, Diabetes & Metabolism Physician provider holding MD credentials at 4301 GREATHOUSE SPRINGS RD, SPRINGDALE, AR, 72762, with a listed phone of (479) 757-1730. NPI 1841258738 was issued on 05/02/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MAASS 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 350 prescription claims written by this provider, covering 60 Medicare beneficiaries and totaling roughly $264K in drug spend. 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.

Endocrinology, Diabetes & Metabolism Physician is a mid-sized specialty nationwide, with 7,852 enrolled providers across 54 states and an average of 2,639 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

4301 GREATHOUSE SPRINGS RD
SPRINGDALE, AR 72762

Provider Details

NPI 1841258738
Specialty Endocrinology, Diabetes & Metabolism Physician
Credentials MD
Gender Male
NPI Issued 05/02/2006

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

350
Total Claims
$264K
Total Drug Cost
60
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
539
Total Day Supply
15,816
Generic Drug Cost
$3K

Patient Demographics

Average Patient Age
67.4 years
Avg HCC Risk Score
1.45
Gender Split
57% female / 43% male
Age Distribution
<65: 17, 65-74: 27, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

What ADAM MAASS, MD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Levothyroxine Sodium
22
Synthroid
Levothyroxine Sodium
21
Spironolactone
15
Metformin Hcl
14
Olmesartan Medoxomil
14
Mounjaro
Tirzepatide
13
Synjardy Xr
Empagliflozin/Metformin Hcl
13

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

Endocrinology, Diabetes & Metabolism Physician Overview

How ADAM MAASS, MD fits within the Endocrinology, Diabetes & Metabolism Physician landscape nationally.

7,852
Endocrinology, Diabetes & Metabolism Physician Providers in US
54
States with Endocrinology, Diabetes & Metabolism Physician
2,639
Avg Claims per Provider

ADAM MAASS, MD's 350 claims are below the specialty average of 2,639.

Nearby Endocrinology, Diabetes & Metabolism Physician Providers in Arkansas

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

Compare Endocrinology, Diabetes & Metabolism Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ADAM MAASS, MD's specialty?
ADAM MAASS, MD specializes in Endocrinology, Diabetes & Metabolism Physician and practices in SPRINGDALE, Arkansas. Credentials: MD.
How much does ADAM MAASS, MD prescribe under Medicare Part D?
In 2023, ADAM MAASS, MD wrote 350 Medicare Part D claims totaling $264K in drug costs for 60 beneficiaries.
Where is ADAM MAASS, MD located?
ADAM MAASS, MD is located at 4301 GREATHOUSE SPRINGS RD, SPRINGDALE, AR, 72762. Phone: (479) 757-1730.
What is ADAM MAASS, MD's NPI number?
ADAM MAASS, MD's National Provider Identifier (NPI) is 1841258738, issued on 05/02/2006.
How many Endocrinology, Diabetes & Metabolism Physician providers are there in the US?
There are 7,852 Endocrinology, Diabetes & Metabolism Physician providers across 54 states in the US. The average Endocrinology, Diabetes & Metabolism Physician provider writes 2,639 Medicare Part D claims per year.
What drugs does ADAM MAASS, MD prescribe most often?
Based on 2023 Medicare Part D data, ADAM MAASS, MD's most frequently prescribed drugs include Levothyroxine Sodium, Synthroid, Spironolactone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ADAM MAASS, MD accept Medicare?
ADAM MAASS, MD appears in CMS Medicare data with 350 Part D claims and 60 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ADAM MAASS, MD's credentials?
ADAM MAASS, MD's NPI is 1841258738 with credentials MD. 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