Nathaniel Cassell, M.D.
NPI 1518302470 · Critical Care Medicine (Internal Medicine) Physician · The Woodlands, TX
Enrolled with Medicare as Practitioner - Critical Care (intensivists) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathaniel Cassell, M.D. is a Critical Care Medicine (Internal Medicine) Physician provider in The Woodlands, TX (NPI 1518302470).
Provider details
- NPI number
- 1518302470
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- Q7844 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
527 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 219 | $119 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 188 | $78 |
| Critical Care, First 30-74 Minutes99291 | 108 | $205 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 12 | $173 |
Typical Medicare-allowed amounts for these services range $78–$205 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 1125 Cypress Station Dr Ste EHouston, TX 77090-3055Phone: (281) 296-8788Fax: (281) 465-4569
Registry dates
- Enumerated
- 2013-05-06
- Last updated
- 2019-12-31
- Certified
- 2019-12-31
Frequently asked questions
- What is Nathaniel Cassell's NPI number?
- Nathaniel Cassell's National Provider Identifier (NPI) is 1518302470, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathaniel Cassell's specialty?
- Nathaniel Cassell is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Nathaniel Cassell located?
- Nathaniel Cassell's practice location on file with NPPES is 1111 Medical Plaza Dr Ste 250, The Woodlands, TX 77380-3477.
- What is Nathaniel Cassell's phone number?
- The practice phone number listed in the NPPES registry for Nathaniel Cassell is (281) 296-8788.
- Does Nathaniel Cassell accept Medicare?
- Nathaniel Cassell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathaniel Cassell's NPI active?
- Yes — Nathaniel Cassell's NPI (1518302470) is active in the NPPES registry as of the last update on 2019-12-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.