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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MRS. LARISSA DIANE WATSON FNP-BC
NPI 1821479908
Nurse Practitioner in Indianapolis, IN

Active since June 15, 2015PECOS EnrolledAccepts Medicare Assignment
52.89/100
CMS Quality Rating
5940 DECATUR BLVD, INDIANAPOLIS, IN 46241(317) 856-2945(317) 856-5122 Get Directions Write a Review

NPPES record last updated: August 14, 2026. Verified against the NPPES registry weekly; last sync: August 23, 2026.

Record update history: Aug 14, 2026, May 3, 2022, Dec 29, 2020 (3 updates tracked since 2020).

About Mrs. Larissa Diane Watson Fnp-bc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MRS. LARISSA DIANE WATSON FNP-BC (NPI 1821479908) is an individual nurse practitioner in Indianapolis, Indiana, licensed in Indiana (71005553A) and active in the NPI registry since June 2015. She is enrolled in Medicare PECOS and is a graduate of Other (2015).

NPPES Registry Identity

NPI1821479908
Entity TypeIndividualFemale
Primary Taxonomy363L00000X
Provider Legal NameMRS. LARISSA DIANE WATSONCredential: FNP-BC
Location Address5940 DECATUR BLVDIndianapolis, IN 46241-9579
Mailing Address5940 Decatur BlvdIndianapolis, IN 46241-9579 · (317) 856-2945 · Fax (317) 856-5122
Phone(317) 856-2945
Fax(317) 856-5122
Sole ProprietorNo
Medical School CMSOtherGraduated 2015
Enumeration DateJune 15, 2015
Last NPPES UpdateAugust 14, 20263 updates tracked since enumeration
NPPES CertifiedAugust 14, 2026
✔ NPI 1821479908 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 4

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
License✔ Licensed in IN · 71005553A
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Also ListedNurse Practitioner · Adult HealthTaxonomy 363LA2200X · License 71005553A (IN), 209023916 (IL)
Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License 209023916 (IL)
Also ListedNurse Practitioner · Primary CareTaxonomy 363LP2300X · License 28208703A (IN)
5940 DECATUR BLVD, Indianapolis, IN 46241
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Other Identifiers 1

Medicaid201312530IN

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, CareSource.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mrs. Larissa Diane Watson Fnp-bc is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1052627775
PECOS Enrollment IDI20150826000893
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 46241 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$82.04 typical visit price
range $53.07 – $161.76
Typical copayment $20.51 (range $13.26 – $40.44)
Most-billed visit code 99203
Established Patient
$94.22 typical visit price
range $16.93 – $132.22
Typical copayment $23.55 (range $4.23 – $33.05)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

52.89/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality45.53
Improvement Activities40
Cost23.24

Other Providers at the Same Location NPPES 10

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

CONNIE LYNN ALLEN FNP
Nurse Practitioner (Acute Care)
5940 DECATUR BLVD
INDIANAPOLIS, IN 46241
Marion County (317) 856-2945
DR. LARRY ONEIL TUNNELL MD
Internal Medicine
5940 DECATUR BLVD
INDIANAPOLIS, IN 46241
Marion County (317) 856-2945
AMERICAN CURRENT CARE PA
Clinic/Center (Urgent Care)
5940 DECATUR BLVD
INDIANAPOLIS, IN 46241
Marion County (317) 856-2945
MRS. APRIL I TOLBERT FNP-C
Nurse Practitioner
5940 DECATUR BLVD
INDIANAPOLIS, IN 46241
Marion County (317) 856-2945
MR. MICHAEL JAMES BRICKENS PT
Physical Therapist
5940 DECATUR BLVD
INDIANAPOLIS, IN 46241
Marion County (317) 856-2945
US MEDGROUP PA
Clinic/Center (Health Service)
5940 DECATUR BLVD
INDIANAPOLIS, IN 46241
Marion County (317) 856-2945
OCCUPATIONAL HEALTH CENTERS OF THE SOUTHWEST P.A.
Clinic/Center (Occupational Medicine)
5940 DECATUR BLVD
INDIANAPOLIS, IN 46241
Marion County (317) 856-2945
TRISH SACHSE DPT
Physical Therapist
5940 DECATUR BLVD
INDIANAPOLIS, IN 46241
Marion County (317) 856-2945

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Larissa Watson's NPI number?

The NPI number for Larissa Watson is 1821479908. It was assigned to this individual provider in the NPPES registry on June 15, 2015.

Where is Larissa Watson located?

Larissa Watson practices at 5940 Decatur Blvd, Indianapolis, IN 46241. The listed phone number is (317) 856-2945.

What is Larissa Watson's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Larissa Watson enrolled in Medicare?

Yes. Larissa Watson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Larissa Watson accept?

Health plans from Anthem Blue Cross and Blue Shield and CareSource list Larissa Watson as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Larissa Watson was last updated on August 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.