Thomas Marston, MD
NPI 1487008975 · Critical Care Medicine (Internal Medicine) Physician · Chandler, AZ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Marston, MD is a Critical Care Medicine (Internal Medicine) Physician provider in Chandler, AZ (NPI 1487008975).
Provider details
- NPI number
- 1487008975
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 66204 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
10 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
531 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 205 | $114 |
| Critical Care, First 30-74 Minutes99291 | 104 | $204 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 95 | $75 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 73 | $165 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 32 | $125 |
| Insertion of Non-Tunneled Central Venous Tube for Infusion (5 Years Or Older)36556 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 18 | 11 |
| Budesonide/Glycopyr/Formoterolbrand: Breztri Aerosphere | 18 | — |
| Azithromycin | 14 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$460 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 1120 S Dobson RdBldg B Ste 225Chandler, AZ 85286Phone: (480) 728-5460Fax: (480) 728-5461
- 3555 S Val Vista DrGilbert, AZ 85297-7323Phone: (480) 909-3870Fax: (480) 728-9616
Registry dates
- Enumerated
- 2016-04-20
- Last updated
- 2024-12-06
- Certified
- 2024-12-06
Frequently asked questions
- What is Thomas Marston's NPI number?
- Thomas Marston's National Provider Identifier (NPI) is 1487008975, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Marston's specialty?
- Thomas Marston is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Marston located?
- Thomas Marston's practice location on file with NPPES is 1955 W Frye Rd, Chandler, AZ 85224-6282.
- What is Thomas Marston's phone number?
- The practice phone number listed in the NPPES registry for Thomas Marston is (480) 909-3870.
- Does Thomas Marston accept Medicare?
- Thomas Marston is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Marston's NPI active?
- Yes — Thomas Marston's NPI (1487008975) is active in the NPPES registry as of the last update on 2024-12-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.