Timothy Sass, M.D.
NPI 1265573166 · Internal Medicine Physician · Princeton, NJ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Timothy Sass, M.D. is a Internal Medicine Physician provider in Princeton, NJ (NPI 1265573166).
Provider details
- NPI number
- 1265573166
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 25MA05084900 (NJ)
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
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
4,957 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) |
|---|---|---|
| Test to Measure Oxygen Level in Blood Using Ear Or Finger Device Continuously Overnight94762 | 832 | $25 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 335 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 322 | $123 |
| Urinalysis, Manual Test81002 | 299 | $3 |
| Analysis of Substance Using Immunoassay Technique, Single Step Method83518 | 299 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 295 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 51 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 317 | 81 |
| Atorvastatin Calcium | 163 | 50 |
| Valsartan | 154 | 42 |
| Triamterene/Hydrochlorothiazidbrand: Triamterene-Hydrochlorothiazid | 106 | 26 |
| Rosuvastatin Calcium | 102 | 31 |
| Etodolac | 100 | 74 |
| Atenolol | 84 | 20 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$271 across 10 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
Registry dates
- Enumerated
- 2007-02-12
- Last updated
- 2012-01-12
Frequently asked questions
- What is Timothy Sass's NPI number?
- Timothy Sass's National Provider Identifier (NPI) is 1265573166, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Timothy Sass's specialty?
- Timothy Sass is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Timothy Sass located?
- Timothy Sass's practice location on file with NPPES is 281 Witherspoon St, Princeton, NJ 08540-3210.
- What is Timothy Sass's phone number?
- The practice phone number listed in the NPPES registry for Timothy Sass is (609) 921-3362.
- Does Timothy Sass accept Medicare?
- Timothy Sass is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Timothy Sass's NPI active?
- Yes — Timothy Sass's NPI (1265573166) is active in the NPPES registry as of the last update on 2012-01-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.