Jack Keiser, FNP
NPI 1104393651 · Family Nurse Practitioner · Nashville, TN
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jack Keiser, FNP is a Family Nurse Practitioner provider in Nashville, TN (NPI 1104393651).
Provider details
- NPI number
- 1104393651
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Male
- Sole proprietor
- No
- License
- 95018639 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
7 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
53 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 27 | $96 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 14 | $71 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 12 | $85 |
Typical Medicare-allowed amounts for these services range $71–$96 (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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$16 across 1 record (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
Additional practice locations (3)
- 611 Gateway Blvd Ste 120South San Francisco, CA 94080-7066Phone: (650) 761-4056
- 333 Se 2nd Ave Ste 2000Miami, FL 33131-2185Phone: (650) 761-4056
- 2513 White Ave Apt 7Nashville, TN 37204-2731Phone: (615) 420-7515Fax: (615) 420-7515
Registry dates
- Enumerated
- 2018-11-01
- Last updated
- 2026-04-16
- Certified
- 2026-04-16
Frequently asked questions
- What is Jack Keiser's NPI number?
- Jack Keiser's National Provider Identifier (NPI) is 1104393651, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jack Keiser's specialty?
- Jack Keiser is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Jack Keiser located?
- Jack Keiser's practice location on file with NPPES is 41 Peabody St, Nashville, TN 37210-2125.
- What is Jack Keiser's phone number?
- The practice phone number listed in the NPPES registry for Jack Keiser is (615) 420-7515.
- Does Jack Keiser accept Medicare?
- Jack Keiser is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jack Keiser's NPI active?
- Yes — Jack Keiser's NPI (1104393651) is active in the NPPES registry as of the last update on 2026-04-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.