Mary Carleton Johnston, MD
NPI 1376034298 · Gynecology Physician · Mobile, AL
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Carleton Johnston, MD is a Gynecology Physician provider in Mobile, AL (NPI 1376034298).
Provider details
- NPI number
- 1376034298
- Entity type
- Individual
- Primary specialty
- Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 44776 (AL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
8 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
84 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) |
|---|---|---|
| Urinalysis, Manual Test81002 | 28 | $3 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 16 | $116 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 15 | $82 |
| Pelvic Exam99459 | 14 | $19 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 11 | $151 |
Typical Medicare-allowed amounts for these services range $3–$151 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Estradiol | 105 | 46 |
| Clobetasol Propionate | 59 | 22 |
| Fluconazole | 55 | 26 |
| Medroxyprogesterone Acetate | 26 | — |
| Metronidazole | 26 | 20 |
| Mirabegronbrand: Myrbetriq | 24 | — |
| Progesterone, Micronizedbrand: Progesterone | 16 | — |
| Nystatin/Triamcinolone Acet |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$289 across 24 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
Registry dates
- Enumerated
- 2018-05-26
- Last updated
- 2023-02-16
- Certified
- 2023-02-16
Frequently asked questions
- What is Mary Carleton Johnston's NPI number?
- Mary Carleton Johnston's National Provider Identifier (NPI) is 1376034298, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Carleton Johnston's specialty?
- Mary Carleton Johnston is listed in the NPPES registry with a primary specialty of Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Carleton Johnston located?
- Mary Carleton Johnston's practice location on file with NPPES is 6701 Airport Blvd Ste B321, Mobile, AL 36608-6703.
- What is Mary Carleton Johnston's phone number?
- The practice phone number listed in the NPPES registry for Mary Carleton Johnston is (251) 633-0793.
- Does Mary Carleton Johnston accept Medicare?
- Mary Carleton Johnston is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Carleton Johnston's NPI active?
- Yes — Mary Carleton Johnston's NPI (1376034298) is active in the NPPES registry as of the last update on 2023-02-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.