Marshall Sack, D.O.
NPI 1629071170 · Family Medicine Physician · Novi, MI
Enrolled with Medicare as Practitioner - General Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marshall Sack, D.O. is a Family Medicine Physician provider in Novi, MI (NPI 1629071170).
Provider details
- NPI number
- 1629071170
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 5101007596 (MI)
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
21 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
3,173 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) |
|---|---|---|
| Chronic Care Management Services for Two Or More Chronic Conditions, Additional 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99439 | 520 | $51 |
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, Each Additional 20 Minutes99458 | 451 | $42 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 396 | $132 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 274 | $66 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 268 | $93 |
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, First 20 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 133 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 265 | 97 |
| Lisinopril | 236 | 85 |
| Amlodipine Besylate | 233 | 86 |
| Buspirone Hcl | 222 | 58 |
| Losartan Potassium | 221 | 72 |
| Levothyroxine Sodium | 215 | 78 |
| Sertraline Hcl | 215 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$880 across 39 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
- 2005-05-28
- Last updated
- 2010-04-26
Frequently asked questions
- What is Marshall Sack's NPI number?
- Marshall Sack's National Provider Identifier (NPI) is 1629071170, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marshall Sack's specialty?
- Marshall Sack is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marshall Sack located?
- Marshall Sack's practice location on file with NPPES is 39500 W 10 Mile Rd, Novi, MI 48375-2947.
- What is Marshall Sack's phone number?
- The practice phone number listed in the NPPES registry for Marshall Sack is (248) 476-0035.
- Does Marshall Sack accept Medicare?
- Marshall Sack is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marshall Sack's NPI active?
- Yes — Marshall Sack's NPI (1629071170) is active in the NPPES registry as of the last update on 2010-04-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.