Isaac Pak, DO
NPI 1497249791 · Critical Care Medicine (Internal Medicine) Physician · Valhalla, NY
Enrolled with Medicare as Practitioner - Critical Care (intensivists) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Isaac Pak, DO is a Critical Care Medicine (Internal Medicine) Physician provider in Valhalla, NY (NPI 1497249791).
Provider details
- NPI number
- 1497249791
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 324740 (NY)
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
8 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
184 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 35 Minutes99232 | 117 | $88 |
| Critical Care, First 30-74 Minutes99291 | 67 | $238 |
Typical Medicare-allowed amounts for these services range $88–$238 (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 (2)
- 707 E Main StMiddletown, NY 10940-2650Phone: (845) 333-6333Fax: (845) 333-7342
- 75 N Country RdPort Jefferson, NY 11777-2119Phone: (631) 473-1320
Registry dates
- Enumerated
- 2018-06-20
- Last updated
- 2024-05-13
- Certified
- 2024-05-13
Frequently asked questions
- What is Isaac Pak's NPI number?
- Isaac Pak's National Provider Identifier (NPI) is 1497249791, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Isaac Pak's specialty?
- Isaac Pak is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Isaac Pak located?
- Isaac Pak's practice location on file with NPPES is 100 Woods Rd, Valhalla, NY 10595-1530.
- What is Isaac Pak's phone number?
- The practice phone number listed in the NPPES registry for Isaac Pak is (914) 493-7000.
- Does Isaac Pak accept Medicare?
- Isaac Pak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Isaac Pak's NPI active?
- Yes — Isaac Pak's NPI (1497249791) is active in the NPPES registry as of the last update on 2024-05-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.