Christen Elfrink, MSN, ANP-BC
NPI 1700163458 · Nurse Practitioner · Saint Louis, MO
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Christen Elfrink, MSN, ANP-BC is a Nurse Practitioner provider in Saint Louis, MO (NPI 1700163458).
Provider details
- NPI number
- 1700163458
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- MSN, ANP-BC
- Sex
- Female
- Sole proprietor
- No
- License
- 2011036531 (MO)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 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
220 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) |
|---|---|---|
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 106 | $85 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 88 | $85 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 26 | $58 |
Typical Medicare-allowed amounts for these services range $58–$85 (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 · 42 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 102 | 17 |
| Lisinopril | 75 | 19 |
| Mirtazapine | 73 | 17 |
| Sertraline Hcl | 72 | 20 |
| Potassium Chloride | 56 | 20 |
| Furosemide | 54 | 15 |
| Atorvastatin Calcium | 52 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-11-09
- Last updated
- 2014-12-02
Frequently asked questions
- What is Christen Elfrink's NPI number?
- Christen Elfrink's National Provider Identifier (NPI) is 1700163458, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christen Elfrink's specialty?
- Christen Elfrink is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Christen Elfrink located?
- Christen Elfrink's practice location on file with NPPES is 4921 Parkview Pl, Saint Louis, MO 63110-1032.
- What is Christen Elfrink's phone number?
- The practice phone number listed in the NPPES registry for Christen Elfrink is (314) 747-1171.
- Does Christen Elfrink accept Medicare?
- Christen Elfrink is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Christen Elfrink's NPI active?
- Yes — Christen Elfrink's NPI (1700163458) is active in the NPPES registry as of the last update on 2014-12-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.