Spencer Ferrell, MD
NPI 1174009534 · Obstetrics & Gynecology Physician · Yankton, SD
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Spencer Ferrell, MD is a Obstetrics & Gynecology Physician provider in Yankton, SD (NPI 1174009534).
Provider details
- NPI number
- 1174009534
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 13625 (SD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
159 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 41 | $87 |
| Screening 3d Breast Mammography77063 | 26 | $50 |
| Screening Mammography77067 | 26 | $124 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 24 | $123 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 17 | $125 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 14 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Estradiol | 35 | 18 |
| Levothyroxine Sodium | 20 | — |
| Atorvastatin Calcium | 19 | — |
| Estradiolbrand: Estradiol (twice Weekly) | 14 | — |
| Metoprolol Succinate | 14 | — |
| Alendronate Sodium | 12 | — |
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 , 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-07-18
- Last updated
- 2022-08-12
- Certified
- 2022-08-12
Frequently asked questions
- What is Spencer Ferrell's NPI number?
- Spencer Ferrell's National Provider Identifier (NPI) is 1174009534, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Spencer Ferrell's specialty?
- Spencer Ferrell is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Spencer Ferrell located?
- Spencer Ferrell's practice location on file with NPPES is 1104 W 8th St, Yankton, SD 57078-3306.
- What is Spencer Ferrell's phone number?
- The practice phone number listed in the NPPES registry for Spencer Ferrell is (605) 665-7841.
- Does Spencer Ferrell accept Medicare?
- Spencer Ferrell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Spencer Ferrell's NPI active?
- Yes — Spencer Ferrell's NPI (1174009534) is active in the NPPES registry as of the last update on 2022-08-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.