Jennifer Phemister, M.D.
NPI 1598008542 · Gastroenterology Physician · Maryville, TN
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jennifer Phemister, M.D. is a Gastroenterology Physician provider in Maryville, TN (NPI 1598008542).
Provider details
- NPI number
- 1598008542
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 40908 (SC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
6 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
420 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) |
|---|---|---|
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 135 | $159 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 101 | $73 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 54 | $108 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 33 | $122 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 30 | $92 |
| Diagnostic Exam of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 36 | 20 |
| Famotidine | 11 | — |
| Upadacitinibbrand: Rinvoq | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$495 across 28 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
Additional practice locations (5)
- 107 Omni Dr Ste aSeneca, SC 29672-9448Phone: (864) 695-6697
- 240 Medical Park BlvdBristol, TN 37620-7346Phone: (423) 990-2424
- 325 N. State of FranklinJohnson City, TN 37614Phone: (423) 439-6283
- 907 E Lamar Alexander PkwyMaryville, TN 37804-5015Phone: (865) 980-4897Fax: (865) 977-4796
- 435 2nd StNewport, TN 37821-3703Phone: (423) 625-2200
Registry dates
- Enumerated
- 2013-03-28
- Last updated
- 2024-08-07
- Certified
- 2024-08-07
Frequently asked questions
- What is Jennifer Phemister's NPI number?
- Jennifer Phemister's National Provider Identifier (NPI) is 1598008542, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jennifer Phemister's specialty?
- Jennifer Phemister is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Jennifer Phemister located?
- Jennifer Phemister's practice location on file with NPPES is 355 Bmh Physicians Office Bldg, Maryville, TN 37804-5820.
- What is Jennifer Phemister's phone number?
- The practice phone number listed in the NPPES registry for Jennifer Phemister is (865) 980-5060.
- Does Jennifer Phemister accept Medicare?
- Jennifer Phemister is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jennifer Phemister's NPI active?
- Yes — Jennifer Phemister's NPI (1598008542) is active in the NPPES registry as of the last update on 2024-08-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.