NPI registry status
Active
2026 NPPES data Adult Medicine Physician NPI 1962544122 M.D.
Verify on CMS → Mary Warren, M.D.
Adult Medicine Physician in Kailua Kona, Hawaii.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 2,481 in Adult Medicine 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
258
Medicare Part D claims · 46 beneficiaries · Adult Medicine Physician avg: 3K
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Mary Warren, M.D. filed 258 Medicare Part D claims in 2023 as a Adult Medicine Physician in Kailua Kona, Hawaii.
- 258
- 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.
Mary Warren, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
258 49th percentile higher than 49% of 1,370,886 prescribers
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)
Mary Warren, M.D. 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 Mary Warren, M.D.?
Quality data not reportedPrimary specialty
Adult Medicine Physician
Medicare Part D claims
258 91% vs specialty avg
Specialty distribution in Hawaii
How Adult Medicine Physician compares to other specialties among Hawaii 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 Adult Medicine 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).
Mary Warren, M.D. appears in the CMS NPPES registry as a Adult Medicine Physician provider holding M.D. credentials at 75-5995 KUAKINI HWY, Kailua Kona, HI, 96740, with a listed phone of (808) 329-2500. NPI 1962544122 was issued on 02/13/2007.
Medicare Part D records for calendar year 2023 show 258 prescription claims written by this provider, covering 46 Medicare beneficiaries and totaling roughly $40K in drug spend.
Adult Medicine Physician is a narrow specialty nationwide, with 2,481 enrolled providers across 52 states and an average of 2,807 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 | 1962544122 |
|---|---|
| Specialty | Adult Medicine Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 02/13/2007 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
258
Total Claims
$40K
Total Drug Cost
46
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 501
- Total Day Supply
- 13,226
- Generic Drug Cost
- $5K
- Antibiotic Claims
- 37
Patient Demographics
- Average Patient Age
- 73.5 years
- Avg HCC Risk Score
- 0.69
- Gender Split
- 70% female / 30% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mary Warren, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
21 claims
- Lorazepam
Lorazepam
20 claims
- Azithromycin
Azithromycin
17 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 21 |
| Lorazepam | 20 |
| Azithromycin | 17 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Adult Medicine Physician Overview
How Mary Warren, M.D. fits within the Adult Medicine Physician landscape nationally.
2,481
Adult Medicine Physician Providers in US
52
States with Adult Medicine Physician
2,807
Avg Claims per Provider
Mary Warren, M.D.'s 258 claims are below the specialty average of 2,807.
Nearby Adult Medicine Physician Providers in Hawaii
Other clinicians with the same primary specialty enrolled in Hawaii, drawn from the same CMS NPPES roster as Warren.
Dr. Javaid Akhter
M.D.
Wailuku, HI
Joel Albus
Kaneohe, HI
Dr. Robert Bird
M.D.
Kahului, HI
Robert Fyrberg
Honolulu, HI
Dr. Jeffrey Goodman
M.D.
Kilauea, HI
Compare Adult Medicine 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 Hawaii medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Adult Medicine 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Hawaii
Frequently Asked Questions
What is Mary Warren, M.D.'s specialty? ▼
Mary Warren, M.D. specializes in Adult Medicine Physician and practices in Kailua Kona, Hawaii. Credentials: M.D..
How much does Mary Warren, M.D. prescribe under Medicare Part D? ▼
In 2023, Mary Warren, M.D. wrote 258 Medicare Part D claims totaling $40K in drug costs for 46 beneficiaries.
Where is Mary Warren, M.D. located? ▼
Mary Warren, M.D. is located at 75-5995 KUAKINI HWY, Kailua Kona, HI, 96740. Phone: (808) 329-2500.
What is Mary Warren, M.D.'s NPI number? ▼
Mary Warren, M.D.'s National Provider Identifier (NPI) is 1962544122, issued on 02/13/2007.
How many Adult Medicine Physician providers are there in the US? ▼
There are 2,481 Adult Medicine Physician providers across 52 states in the US. The average Adult Medicine Physician provider writes 2,807 Medicare Part D claims per year.
What drugs does Mary Warren, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Mary Warren, M.D.'s most frequently prescribed drugs include Levothyroxine Sodium, Lorazepam, Azithromycin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mary Warren, M.D. accept Medicare? ▼
Mary Warren, M.D. appears in CMS Medicare data with 258 Part D claims and 46 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mary Warren, M.D.'s credentials? ▼
Mary Warren, M.D.'s NPI is 1962544122 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.
- 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
Compiled from official public sources by the PlainDoctor editorial team.