LESLIE B LITTLEFIELD MD
NPI 1891181616
Internal Medicine - Critical Care Medicine in Sacramento, CA
About Leslie B Littlefield Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LESLIE B LITTLEFIELD MD (NPI 1891181616) is an individual critical care medicine provider in Sacramento, California, licensed in California (A150611) and active in the NPI registry since April 2015. She is enrolled in Medicare PECOS and is a graduate of Other (2013).
NPPES Registry Identity
Specialties & Licenses
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
Leslie B Littlefield Md 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
4Medicare enrollment records show Leslie Littlefield reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Sacramento, CA 95838
- Reassigned Medicare billing, California enrollment
- 1,191 clinicians in this Medicare group
Vacaville, CA 95687
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Northbay Physicians Surgery Center, LLC
- 516 clinicians in this Medicare group
Anaheim, CA 92805
- Reassigned Medicare billing, California enrollment
- 12 clinicians in this Medicare group
San Bernardino, CA 92404
- Reassigned Medicare billing, California enrollment
- 1,216 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 4
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 95816 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Leslie Littlefield's NPI number?
The NPI number for Leslie Littlefield is 1891181616. It was assigned to this individual provider in the NPPES registry on April 8, 2015.
Where is Leslie Littlefield located?
Leslie Littlefield practices at 3000 Q St Fl 3, Sacramento, CA 95816. The listed phone number is (916) 733-3400.
What is Leslie Littlefield's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.
Is Leslie Littlefield enrolled in Medicare?
Yes. Leslie Littlefield 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 Leslie Littlefield's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Leslie Littlefield reassigns Medicare benefits to 4 organizations: Dignity Health Medical Foundation (Sacramento, CA), Northbay Healthcare Group (Vacaville, CA), Tp-Health Ca PC (Anaheim, CA) and Inpatient Specialists Of California, PC (San Bernardino, CA). 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 Leslie Littlefield's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Leslie Littlefield was last updated on October 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 32 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.
# Leslie B Littlefield, MD · NPI 1891181616
Critical Care Medicine physician in Sacramento, California. Individual provider, active in the CMS NPPES registry since April 8, 2015.
## Identity
- **NPI:** 1891181616 (Entity type: Individual)
- **Enumerated:** April 8, 2015
- **Primary specialty:** Internal Medicine - Critical Care Medicine · taxonomy 207RC0200X
- **State license:** A150611 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 3000 Q ST FL 3, Sacramento, CA 95816-7058
- **Phone:** (916) 733-3400 · **Fax:** (916) 733-5384
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Dignity Health Medical Foundation (NPI 1770725863, Sacramento, CA); Northbay Healthcare Group (NPI 1255483202, Vacaville, CA); Tp-Health Ca PC (NPI 1336785187, Anaheim, CA); Inpatient Specialists Of California, PC (NPI 1952792475, San Bernardino, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2013
## Record status
- **NPPES last updated:** October 6, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1891181616) · Data from the CMS NPPES public registry.