Larissa C. Day Walz, MD
Internal Medicine Physician · Carmel, IN
Larissa C. Day Walz, MD is an internal medicine physician with a practice address in Carmel, Indiana, and NPI 1316114770, issued on May 14, 2008. Check the license (Indiana 01068078A, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- Larissa C. Day Walz
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 01068078A IN
Self-reported in NPPES; status is on the state search - Practice location
- 11725 N Illinois Street, Carmel, IN 46032
- Phone
- (317) 688-5522
- Enumerated
- May 14, 2008
- Record last updated
- Jul 21, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (317) 688-5533
- Medicaid ID
- 200982230 IN
- Medicare enrollment
- Enrolled (PECOS I20100706000314); accepts Medicare assignment
- Medical or professional school
- Indiana University School Of Medicine, 2007
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,109 in Indiana → Look up another NPI →
Also registered at 11725 N Illinois Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Larissa C. Day Walz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01068078ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% more Medicare Part D claims than the average internal medicine physician in 2024
5,461 Medicare Part D claims for 466 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 42 claims were for opioids.
Most prescribed
- Atorvastatin Calcium443 claims
- Levothyroxine Sodium366 claims
- Rosuvastatin Calcium285 claims
- Losartan Potassium253 claims
- Amlodipine Besylate225 claims
- Duloxetine Hcl161 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Indiana University Health Care Associates IncIndianapolis, IN
- IU Health Medical Group LLCIndianapolis, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Larissa C. Day Walz among 2,109 internal medicine physician records in Indiana
Larissa C. Day Walz, MD is one of 2,109 internal medicine physician records with a practice address in Indiana. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 52% of them.
- NPI issued2008 · 52% of these records are older, 43% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2007 · median 2005 among the 1,448 with a school on file
- Record last updated2014 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
68 internal medicine physician records list a practice address in Carmel
They are 68 of the 3,727 NPPES records with a practice address in Carmel, and 2,109 internal medicine physician records in Indiana.
All 2,109 in Indiana → Every provider in Carmel → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Linda Abels, MDCarmel, IN 460321396718292
- Karen Adkins, MDCarmel, IN 460321467435792
- Gary Ayres, MDCarmel, IN 460321962475574
- Craig Cieciura, MDCarmel, IN 460321265406458
- Stephen Coulson, M.D.Carmel, IN 460321841292778
- Geraldine Darroca, MDCarmel, IN 460321164495644
- Barry Freeman, M.D.Carmel, IN 460321841285426
- Thomas Hutchinson, M.D.Carmel, IN 460321073588893
Common questions
What is Larissa C. Day Walz, MD's NPI number?
Larissa C. Day Walz, MD's National Provider Identifier (NPI) is 1316114770, issued on May 14, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Larissa C. Day Walz, MD located?
The NPPES record lists a practice address at 11725 N Illinois Street, Carmel, IN, 46032. Phone: (317) 688-5522. Providers update this record themselves, so call before visiting.
How can I verify Larissa C. Day Walz, MD's license?
NPPES lists Indiana license number 01068078A, as entered by the provider. Search the Medical Licensing Board of Indiana at https://www.in.gov/pla/professions/physicians-home/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Larissa C. Day Walz, MD prescribe under Medicare Part D?
In 2024, Larissa C. Day Walz, MD had 5,461 Medicare Part D claims for 466 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.