NPI registry status
Active
2026 NPPES data Undersea and Hyperbaric Medicine (Preventive Medicine) Physician NPI 1366173296 MD, MS
Verify on CMS → Greg Zhang, MD, MS
Undersea and Hyperbaric Medicine (Preventive Medicine) Physician in Denison, 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 243 in Undersea and Hyperbaric Medicine (Preventive 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
42
Medicare Part D claims · 23 beneficiaries · Undersea and Hyperbaric Medicine (Preventive Medicine) Physician avg: 522
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Greg Zhang, MD, MS filed 42 Medicare Part D claims in 2023 as a Undersea and Hyperbaric Medicine (Preventive Medicine) Physician in Denison, Texas.
- 42
- Part D claims, 2023
- 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.
Greg Zhang, MD, MS's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
42 0th percentile higher than 0% 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 certification likely (heuristic, not verified)
Greg Zhang, MD, MS 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).
What does the federal data show about Greg Zhang, MD, MS?
Quality data not reportedPrimary specialty
Undersea and Hyperbaric Medicine (Preventive Medicine) Physician
Medicare Part D claims
42 92% vs specialty avg
Specialty distribution in Texas
How Undersea and Hyperbaric Medicine (Preventive Medicine) Physician compares to other specialties among Texas 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 Undersea and Hyperbaric Medicine (Preventive 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).
Greg Zhang, MD, MS appears in the CMS NPPES registry as an Undersea and Hyperbaric Medicine (Preventive Medicine) Physician provider holding MD, MS credentials at 4616 N HWY 75, Denison, TX, 75020, with a listed phone of (903) 698-6015. NPI 1366173296 was issued on 06/21/2022.
Medicare Part D records for calendar year 2023 show 42 prescription claims written by this provider, covering 23 Medicare beneficiaries and totaling roughly $482 in drug spend.
Undersea and Hyperbaric Medicine (Preventive Medicine) Physician is a narrow specialty nationwide, with 243 enrolled providers across 42 states and an average of 522 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 | 1366173296 |
|---|---|
| Specialty | Undersea and Hyperbaric Medicine (Preventive Medicine) Physician |
| Credentials | MD, MS |
| Gender | Male |
| NPI Issued | 06/21/2022 |
Hospital and facility affiliations
Facilities where Greg Zhang, MD, MS 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.
Dynamic Wound Care LLC
Denison, 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 Greg Zhang, MD, MS. To verify Greg Zhang, MD, MS'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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
42
Total Claims
$482
Total Drug Cost
23
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 44
- Total Day Supply
- 566
- Generic Drug Cost
- $472
- Antibiotic Claims
- 12
Patient Demographics
- Average Patient Age
- 73.9 years
- Avg HCC Risk Score
- 1.30
- Gender Split
- 48% female / 52% male
More Undersea and Hyperbaric Medicine (Preventive Medicine) Physician in TX →
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Compare specialties →
Undersea and Hyperbaric Medicine (Preventive Medicine) Physician Overview
How Greg Zhang, MD, MS fits within the Undersea and Hyperbaric Medicine (Preventive Medicine) Physician landscape nationally.
243
Undersea and Hyperbaric Medicine (Preventive Medicine) Physician Providers in US
42
States with Undersea and Hyperbaric Medicine (Preventive Medicine) Physician
522
Avg Claims per Provider
Greg Zhang, MD, MS's 42 claims are below the specialty average of 522.
Nearby Undersea and Hyperbaric Medicine (Preventive Medicine) Physician Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Zhang.
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 Undersea and Hyperbaric Medicine (Preventive 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
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
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Frequently Asked Questions
What is Greg Zhang, MD, MS's specialty? ▼
Greg Zhang, MD, MS specializes in Undersea and Hyperbaric Medicine (Preventive Medicine) Physician and practices in Denison, Texas. Credentials: MD, MS.
How much does Greg Zhang, MD, MS prescribe under Medicare Part D? ▼
In 2023, Greg Zhang, MD, MS wrote 42 Medicare Part D claims totaling $482 in drug costs for 23 beneficiaries.
Where is Greg Zhang, MD, MS located? ▼
Greg Zhang, MD, MS is located at 4616 N HWY 75, Denison, TX, 75020. Phone: (903) 698-6015.
What is Greg Zhang, MD, MS's NPI number? ▼
Greg Zhang, MD, MS's National Provider Identifier (NPI) is 1366173296, issued on 06/21/2022.
How many Undersea and Hyperbaric Medicine (Preventive Medicine) Physician providers are there in the US? ▼
There are 243 Undersea and Hyperbaric Medicine (Preventive Medicine) Physician providers across 42 states in the US. The average Undersea and Hyperbaric Medicine (Preventive Medicine) Physician provider writes 522 Medicare Part D claims per year.
Does Greg Zhang, MD, MS accept Medicare? ▼
Greg Zhang, MD, MS appears in CMS Medicare data with 42 Part D claims and 23 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Greg Zhang, MD, MS's credentials? ▼
Greg Zhang, MD, MS's NPI is 1366173296 with credentials MD, MS. 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.
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.