Daniel Slack, MD
NPI 1952864027 · Internal Medicine Physician · Fairfield, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Daniel Slack, MD is a Internal Medicine Physician provider in Fairfield, CA (NPI 1952864027).
Provider details
- NPI number
- 1952864027
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 176336 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
16 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) |
|---|---|---|
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 16 | $176 |
Typical Medicare-allowed amounts for these services range $176–$176 (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 (1)
- 4150 V St # 1100Sacramento, CA 95817-1460Phone: (916) 734-2737
Registry dates
- Enumerated
- 2019-04-07
- Last updated
- 2024-09-26
- Certified
- 2024-09-26
Frequently asked questions
- What is Daniel Slack's NPI number?
- Daniel Slack's National Provider Identifier (NPI) is 1952864027, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Daniel Slack's specialty?
- Daniel Slack is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Daniel Slack located?
- Daniel Slack's practice location on file with NPPES is 101 Bodin Circle, Fairfield, CA 94533.
- What is Daniel Slack's phone number?
- The practice phone number listed in the NPPES registry for Daniel Slack is (707) 423-3000.
- Does Daniel Slack accept Medicare?
- Daniel Slack is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Daniel Slack's NPI active?
- Yes — Daniel Slack's NPI (1952864027) is active in the NPPES registry as of the last update on 2024-09-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.