Mary Hammock, MD
NPI 1174509640 · Internal Medicine Physician · Chattanooga, TN
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Hammock, MD is a Internal Medicine Physician provider in Chattanooga, TN (NPI 1174509640).
Provider details
- NPI number
- 1174509640
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 14192 (TN)
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
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
2,566 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 | 282 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 267 | $10 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 250 | $8 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 234 | $16 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 219 | $13 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 210 | $119 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 96 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 258 | 73 |
| Amlodipine Besylate | 176 | 57 |
| Lisinopril | 165 | 51 |
| Losartan Potassium | 150 | 47 |
| Atorvastatin Calcium | 143 | 46 |
| Rosuvastatin Calcium | 135 | 42 |
| Triamterene/Hydrochlorothiazid |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-16
- Last updated
- 2009-01-15
Frequently asked questions
- What is Mary Hammock's NPI number?
- Mary Hammock's National Provider Identifier (NPI) is 1174509640, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Hammock's specialty?
- Mary Hammock is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Hammock located?
- Mary Hammock's practice location on file with NPPES is 725 Glenwood Dr, Chattanooga, TN 37404-1163.
- What is Mary Hammock's phone number?
- The practice phone number listed in the NPPES registry for Mary Hammock is (423) 756-5779.
- Does Mary Hammock accept Medicare?
- Mary Hammock is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Hammock's NPI active?
- Yes — Mary Hammock's NPI (1174509640) is active in the NPPES registry as of the last update on 2009-01-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.