David Slack, MD
NPI 1205895554 · Internal Medicine Physician · Easthampton, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Slack, MD is a Internal Medicine Physician provider in Easthampton, MA (NPI 1205895554).
Provider details
- NPI number
- 1205895554
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 72497 (MA)
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
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
5,890 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 969 | $9 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 465 | $13 |
| Blood Test, Basic Group of Blood Chemicals (calcium, Total)80048 | 454 | $8 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 397 | $63 |
| Hemoglobin A1c Level83036 | 323 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 308 | $129 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 102 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 297 | 86 |
| Losartan Potassium | 229 | 73 |
| Amlodipine Besylate | 216 | 62 |
| Lisinopril | 197 | 60 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 185 | 24 |
| Oxycodone Hcl | 184 | 30 |
| Clonazepam |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-23
- Last updated
- 2008-06-17
Frequently asked questions
- What is David Slack's NPI number?
- David Slack's National Provider Identifier (NPI) is 1205895554, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Slack's specialty?
- David Slack is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is David Slack located?
- David Slack's practice location on file with NPPES is 179 Northampton St, Easthampton, MA 01027-1057.
- What is David Slack's phone number?
- The practice phone number listed in the NPPES registry for David Slack is (413) 529-9300.
- Does David Slack accept Medicare?
- David Slack is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Slack's NPI active?
- Yes — David Slack's NPI (1205895554) is active in the NPPES registry as of the last update on 2008-06-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.