NPI registry status
Active
2026 NPPES data Geriatric Medicine (Internal Medicine) Physician NPI 1306008552 MD
Verify on CMS → Marvin Delgado-Guay, MD
Geriatric Medicine (Internal Medicine) Physician in Houston, Texas.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 4,161 in Geriatric 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
316
Medicare Part D claims · 159 beneficiaries · Geriatric Medicine (Internal Medicine) Physician avg: 4K
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
81.4/100
▼ 2 pts below national avg 83.1 · Above neutral
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Marvin Delgado-Guay, MD reported a CMS MIPS final score of 81.4/100 - below the 83.1 national average - and filed 316 Medicare Part D claims in 2023.
- 81.4/100
- MIPS score · -2 vs avg
- 316
- Part D claims, 2023
- 91%
- generic prescribing
- Likely
- board-certified (heuristic)
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.
Marvin Delgado-Guay, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
81 36th percentile higher than 36% of 477,587 scored providers
Each bar is a band; taller bars hold more scored 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.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Marvin Delgado-Guay, MD sits
This provider among geriatric medicine (internal medicine) physician peers
Across the 724 geriatric medicine (internal medicine) physician providers who report both Medicare Part D prescribing and a MIPS quality score, Marvin Delgado-Guay, MD writes more Part D claims than 20% of them and scores higher on MIPS quality than 39% - placing this provider in the lower-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one geriatric medicine (internal medicine) physician peer from a representative sample of 60; the gold marker is Marvin Delgado-Guay, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Marvin Delgado-Guay, MD 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 Marvin Delgado-Guay, MD?
Near national averagePrimary specialty
Geriatric Medicine (Internal Medicine) Physician
Medicare Part D claims
316 93% vs specialty avg
MIPS final score
81.4/100 1.7 pts vs avg
Specialty distribution in Texas
How Geriatric Medicine (Internal Medicine) Physician compares to other specialties among Texas providers
Medicare quality performance, MIPS
Marvin Delgado-Guay, MD's 2023 MIPS final score plotted against the Geriatric Medicine (Internal Medicine) Physician national average
- MIPS Final Score
- 81.4/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Geriatric Medicine (Internal Medicine) Physician) - 81.4/100 vs national avg 83.1
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).
Marvin Delgado-Guay, MD appears in the CMS NPPES registry as a Geriatric Medicine (Internal Medicine) Physician provider holding MD credentials at 1515 HOLCOMBE BLVD, Houston, TX, 77030, with a listed phone of (713) 792-6161. NPI 1306008552 was issued on 06/30/2008.
Medicare Part D records for calendar year 2023 show 316 prescription claims written by this provider, covering 159 Medicare beneficiaries and totaling roughly $16K in drug spend, split 9% brand-name and 91% generic by claim count, with an opioid prescribing rate of 57.6%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 81.4/100 for the 2023 performance year (Quality 81.3, Cost 50), compared with the national average of 83.1.
Geriatric Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 4,161 enrolled providers across 52 states and an average of 4,450 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 | 1306008552 |
|---|---|
| Specialty | Geriatric Medicine (Internal Medicine) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/30/2008 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
81.3897
Final Score
Avg: 83.1
81.2519
Quality
49.9786
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Marvin Delgado-Guay, MD 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.
Physicians Referral Service
Houston, TX
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Texas TMB 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~77K Texas medical licensees in 2023 - they are NOT specific to Marvin Delgado-Guay, MD. To verify Marvin Delgado-Guay, MD's current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases
TMB publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Marvin Delgado-Guay, MD - brand share 9.0%
Geriatric Medicine (Internal Medicine) Physician average
9% brand-name claims vs 91% generic, on 316 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.
316
Total Claims
$16K
Total Drug Cost
159
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 329
- Total Day Supply
- 8,032
- Brand vs Generic
- 9% brand / 91% generic
- Brand Drug Cost
- $6K
- Generic Drug Cost
- $10K
- Opioid Claims
- 182 (57.6% rate)
Patient Demographics
- Average Patient Age
- 68.8 years
- Avg HCC Risk Score
- 3.47
- Gender Split
- 52% female / 48% male
- Age Distribution
- <65: 37, 65-74: 86, 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 Marvin Delgado-Guay, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
42 claims
- Morphine Sulfate Er
Morphine Sulfate Er
27 claims
- Olanzapine
Olanzapine
27 claims
- Fentanyl
Fentanyl
24 claims
- Morphine Sulfate
Morphine Sulfate
22 claims
- Hydromorphone Hcl
Hydromorphone Hcl
20 claims
- Oxycodone Hcl
Oxycodone Hcl
19 claims
- Duloxetine Hcl 14
Duloxetine Hcl
14 claims
| Drug | Claims |
|---|---|
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 42 |
| Morphine Sulfate Er Morphine Sulfate | 27 |
| Olanzapine | 27 |
| Fentanyl | 24 |
| Morphine Sulfate | 22 |
| Hydromorphone Hcl | 20 |
| Oxycodone Hcl | 19 |
| Duloxetine Hcl | 14 |
| Methylphenidate Hcl | 13 |
| Gabapentin | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Geriatric Medicine (Internal Medicine) Physician in TX →
All providers in Texas →
Compare specialties →
Geriatric Medicine (Internal Medicine) Physician Overview
How Marvin Delgado-Guay, MD fits within the Geriatric Medicine (Internal Medicine) Physician landscape nationally.
4,161
Geriatric Medicine (Internal Medicine) Physician Providers in US
52
States with Geriatric Medicine (Internal Medicine) Physician
4,450
Avg Claims per Provider
Marvin Delgado-Guay, MD's 316 claims are below the specialty average of 4,450.
Nearby Geriatric Medicine (Internal Medicine) Physician Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Delgado-Guay.
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 Texas medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Geriatric 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.
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Frequently Asked Questions
What is Marvin Delgado-Guay, MD's specialty? ▼
Marvin Delgado-Guay, MD specializes in Geriatric Medicine (Internal Medicine) Physician and practices in Houston, Texas. Credentials: MD.
How much does Marvin Delgado-Guay, MD prescribe under Medicare Part D? ▼
In 2023, Marvin Delgado-Guay, MD wrote 316 Medicare Part D claims totaling $16K in drug costs for 159 beneficiaries.
What is Marvin Delgado-Guay, MD's Medicare quality score? ▼
Marvin Delgado-Guay, MD has a CMS MIPS Final Score of 81.4/100 (Quality: 81.3, Cost: 50). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Marvin Delgado-Guay, MD located? ▼
Marvin Delgado-Guay, MD is located at 1515 HOLCOMBE BLVD, Houston, TX, 77030. Phone: (713) 792-6161.
What is Marvin Delgado-Guay, MD's NPI number? ▼
Marvin Delgado-Guay, MD's National Provider Identifier (NPI) is 1306008552, issued on 06/30/2008.
Does Marvin Delgado-Guay, MD prescribe more brand-name or generic drugs? ▼
Marvin Delgado-Guay, MD's prescribing is 9% brand-name and 91% generic drugs by claim count, with $6K in brand drug costs.
Does Marvin Delgado-Guay, MD prescribe opioids? ▼
Yes, Marvin Delgado-Guay, MD had 182 opioid claims in 2023 with an opioid prescribing rate of 57.6%.
How many Geriatric Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 4,161 Geriatric Medicine (Internal Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Internal Medicine) Physician provider writes 4,450 Medicare Part D claims per year.
What drugs does Marvin Delgado-Guay, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Marvin Delgado-Guay, MD's most frequently prescribed drugs include Hydrocodone-Acetaminophen, Morphine Sulfate Er, Olanzapine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Marvin Delgado-Guay, MD accept Medicare? ▼
Marvin Delgado-Guay, MD appears in CMS Medicare data with 316 Part D claims and 159 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Marvin Delgado-Guay, MD's credentials? ▼
Marvin Delgado-Guay, MD's NPI is 1306008552 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
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
Compiled from official public sources by the PlainDoctor editorial team.