NPI registry status
Active
2026 NPPES data Obesity Medicine (Internal Medicine) Physician NPI 1558665398 M.D.
Verify on CMS → Armando De Guzman, M.D.
Obesity Medicine (Internal Medicine) Physician in Tucson, Arizona.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 145 in Obesity Medicine (Internal 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
13
Medicare Part D claims · Obesity Medicine (Internal Medicine) Physician avg: 1K
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Armando De Guzman, M.D. filed 13 Medicare Part D claims in 2023 as an Obesity Medicine (Internal Medicine) Physician in Tucson, Arizona.
- 13
- Part D claims, 2023
- ≥0th
- pct by Part D claim volume (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.
Armando De Guzman, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
13 ≥ 0th percentile 0% of 1,370,886 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Armando De Guzman, 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 Armando De Guzman, M.D.?
Quality data not reportedPrimary specialty
Obesity Medicine (Internal Medicine) Physician
Medicare Part D claims
13 99% vs specialty avg
Specialty distribution in Arizona
How Obesity Medicine (Internal Medicine) Physician compares to other specialties among Arizona 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 Obesity Medicine (Internal 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).
Armando De Guzman, M.D. appears in the CMS NPPES registry as an Obesity Medicine (Internal Medicine) Physician provider holding M.D. credentials at 9420 E GOLF LINKS RD, Tucson, AZ, 85730, with a listed phone of (520) 834-4904. NPI 1558665398 was issued on 01/10/2011.
Medicare Part D records for calendar year 2023 show 13 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $319 in drug spend.
Obesity Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 145 enrolled providers across 36 states and an average of 1,046 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 | 1558665398 |
|---|---|
| Specialty | Obesity Medicine (Internal Medicine) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 01/10/2011 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
13
Total Claims
$319
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 19
- Total Day Supply
- 490
- Brand Drug Cost
- $0
- Generic Drug Cost
- $319
Patient Demographics
- Average Patient Age
- 76.0 years
- Avg HCC Risk Score
- 1.58
More Obesity Medicine (Internal Medicine) Physician in AZ →
All providers in Arizona →
Compare specialties →
Obesity Medicine (Internal Medicine) Physician Overview
How Armando De Guzman, M.D. fits within the Obesity Medicine (Internal Medicine) Physician landscape nationally.
145
Obesity Medicine (Internal Medicine) Physician Providers in US
36
States with Obesity Medicine (Internal Medicine) Physician
1,046
Avg Claims per Provider
Armando De Guzman, M.D.'s 13 claims are below the specialty average of 1,046.
Nearby Obesity Medicine (Internal Medicine) Physician Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as De Guzman.
One of 3 Obesity Medicine (Internal Medicine) Physician providers enrolled in Arizona, 2 are shown here.
Compare Obesity Medicine (Internal 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 Arizona medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Obesity Medicine (Internal 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
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Medical Specialties Explained
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Understanding Medicare Claims Data
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Frequently Asked Questions
What is Armando De Guzman, M.D.'s specialty? ▼
Armando De Guzman, M.D. specializes in Obesity Medicine (Internal Medicine) Physician and practices in Tucson, Arizona. Credentials: M.D..
How much does Armando De Guzman, M.D. prescribe under Medicare Part D? ▼
In 2023, Armando De Guzman, M.D. wrote 13 Medicare Part D claims totaling $319 in drug costs for N/A beneficiaries.
Where is Armando De Guzman, M.D. located? ▼
Armando De Guzman, M.D. is located at 9420 E GOLF LINKS RD, Tucson, AZ, 85730. Phone: (520) 834-4904.
What is Armando De Guzman, M.D.'s NPI number? ▼
Armando De Guzman, M.D.'s National Provider Identifier (NPI) is 1558665398, issued on 01/10/2011.
How many Obesity Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 145 Obesity Medicine (Internal Medicine) Physician providers across 36 states in the US. The average Obesity Medicine (Internal Medicine) Physician provider writes 1,046 Medicare Part D claims per year.
Does Armando De Guzman, M.D. accept Medicare? ▼
Armando De Guzman, M.D. appears in CMS Medicare data with 13 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Armando De Guzman, M.D.'s credentials? ▼
Armando De Guzman, M.D.'s NPI is 1558665398 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
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.