Margaret Larson, ARNP
NPI 1699788539 · Family Nurse Practitioner · Renton, WA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Larson, ARNP is a Family Nurse Practitioner provider in Renton, WA (NPI 1699788539).
Provider details
- NPI number
- 1699788539
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- ARNP
- Sex
- Female
- Sole proprietor
- No
- License
- AP30007129 (WA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
248 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 86 | $118 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 65 | $82 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 47 | $165 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 27 | $53 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 23 | $122 |
Typical Medicare-allowed amounts for these services range $53–$165 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 28 | 18 |
| Levothyroxine Sodium | 23 | 15 |
| Atorvastatin Calcium | 23 | 12 |
| Azithromycin | 21 | 18 |
| Lisinopril | 19 | — |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 19 | 17 |
| Furosemide |
Practice location
Mailing address
Additional practice locations (1)
- 202 N Division St Ste 301Auburn, WA 98001-4939Phone: (253) 876-7997Fax: (253) 876-8015
Registry dates
- Enumerated
- 2006-08-14
- Last updated
- 2025-08-18
- Certified
- 2025-08-18
Frequently asked questions
- What is Margaret Larson's NPI number?
- Margaret Larson's National Provider Identifier (NPI) is 1699788539, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Larson's specialty?
- Margaret Larson is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Margaret Larson located?
- Margaret Larson's practice location on file with NPPES is 64 Rainier Ave S, Renton, WA 98057-2047.
- What is Margaret Larson's phone number?
- The practice phone number listed in the NPPES registry for Margaret Larson is (888) 405-6396.
- Does Margaret Larson accept Medicare?
- Margaret Larson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Larson's NPI active?
- Yes — Margaret Larson's NPI (1699788539) is active in the NPPES registry as of the last update on 2025-08-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.