Robert Sack, M.D.
NPI 1124148721 · Psychiatry Physician · Lancaster, PA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Sack, M.D. is a Psychiatry Physician provider in Lancaster, PA (NPI 1124148721).
Provider details
- NPI number
- 1124148721
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- MD438306 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clonazepam | 58 | 13 |
| Trazodone Hcl | 50 | — |
| Alprazolam | 30 | — |
| Clozapine | 30 | — |
| Sertraline Hcl | 28 | — |
| Duloxetine Hcl | 27 | — |
| Benztropine Mesylate | 23 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-29
- Last updated
- 2016-07-09
Frequently asked questions
- What is Robert Sack's NPI number?
- Robert Sack's National Provider Identifier (NPI) is 1124148721, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Sack's specialty?
- Robert Sack is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Sack located?
- Robert Sack's practice location on file with NPPES is 410 N Prince St, Lancaster, PA 17603-3010.
- What is Robert Sack's phone number?
- The practice phone number listed in the NPPES registry for Robert Sack is (717) 560-7917.
- Does Robert Sack accept Medicare?
- Robert Sack is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Sack's NPI active?
- Yes — Robert Sack's NPI (1124148721) is active in the NPPES registry as of the last update on 2016-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.