DR. MARK LA SHELL M.D.
NPI 1205825288
Allergy & Immunology in Topeka, KS
About Dr. Mark La Shell M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARK LA SHELL M.D. (NPI 1205825288) is an individual allergy & immunology provider in Topeka, Kansas, licensed in Kansas (04-54260) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of University Of Kansas School Of Med (kc/wich/sal) (1997).
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Locations 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Mark La Shell M.d. 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.
Medicare Billing Reassignments
2Medicare enrollment records show Mark La Shell reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Jefferson City, MO 65109
- Reassigned Medicare billing, Missouri enrollment
- Medicare enrollment name: Jefferson City Medical Group PC
- 155 clinicians in this Medicare group
Renton, WA 98057
- Reassigned Medicare billing, Washington enrollment
- 2,678 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Other Providers at the Same Location NPPES 14
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
TOPEKA, KS 66606
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 Mark La Shell's NPI number?
The NPI number for Mark La Shell is 1205825288. It was assigned to this individual provider in the NPPES registry on October 21, 2005.
Where is Mark La Shell located?
Mark La Shell practices at 909 SW Mulvane St, Topeka, KS 66606. The listed phone number is (785) 270-4613.
What is Mark La Shell's specialty?
The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.
Is Mark La Shell enrolled in Medicare?
Yes. Mark La Shell 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.
Which organizations bill Medicare for Mark La Shell's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark La Shell reassigns Medicare benefits to 2 organizations: Jefferson City Medical Group, P.C. (Jefferson City, MO) and Kaiser Foundation Health Plan Of Washington (Renton, WA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mark La Shell's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mark La Shell accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 1 other insurer list Mark La Shell 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 Mark La Shell was last updated on October 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Dr. Mark La Shell, M.D. · NPI 1205825288
Allergy & Immunology physician in Topeka, Kansas. Individual provider, active in the CMS NPPES registry since October 21, 2005.
## Identity
- **NPI:** 1205825288 (Entity type: Individual)
- **Enumerated:** October 21, 2005
- **Primary specialty:** Allergy & Immunology · taxonomy 207K00000X
- **State license:** 04-54260 (Kansas)
- **Sole proprietor:** No
## Practice location
- **Address:** 909 SW MULVANE ST, Topeka, KS 66606-1677
- **Phone:** (785) 270-4613 · **Fax:** (785) 368-0779
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Jefferson City Medical Group, P.C. (NPI 1336189398, Jefferson City, MO); Kaiser Foundation Health Plan Of Washington (NPI 1124264577, Renton, WA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Kansas School Of Med, class of 1997
## Record status
- **NPPES last updated:** October 15, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1205825288) · Data from the CMS NPPES public registry.