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DR. KRISTIN T MILLS DO
NPI 1851602536
Internal Medicine - Infectious Disease in Sacramento, CA

Active since June 28, 2010PECOS Enrolled
WELLSPACE HEALTH J STREET COMMUNITY HEALTH CENTER, 1820 J STREET, SACRAMENTO, CA 95811(916) 737-5555 Get Directions Write a Review

NPPES record last updated: September 6, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 6, 2022, Apr 9, 2019 (2 updates tracked since 2019).

About Dr. Kristin T Mills Do NPPES

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

DR. KRISTIN T MILLS DO (NPI 1851602536) is an individual infectious disease provider in Sacramento, California, licensed in California (20170) and active in the NPI registry since June 2010. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1851602536
Entity TypeIndividualFemale
Primary Taxonomy207RI0200X
Provider Legal NameDR. KRISTIN T MILLSCredential: DO
Location AddressWELLSPACE HEALTH J STREET COMMUNITY HEALTH CENTER, 1820 J STREETSacramento, CA 95811
Mailing Address2472 Raywood Vw Apt 621Colorado Springs, CO 80920-7757 · (240) 810-2850
Phone(916) 737-5555
Sole ProprietorNo
Enumeration DateJune 28, 2010
Last NPPES UpdateSeptember 6, 20222 updates tracked since enumeration
NPPES CertifiedSeptember 2, 2022
✔ NPI 1851602536 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
License✔ Licensed in CA · 20170
Definition
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
Also ListedInternal MedicineTaxonomy 207R00000X · License DR.0061815 (CO)
WELLSPACE HEALTH J STREET COMMUNITY HEALTH CENTER, Sacramento, CA 95811
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Kristin T Mills Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Medicare Billing Reassignment

Medicare enrollment records show Kristin Mills reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Optumcare Colorado Medical Group LLC
875 mi
Rheumatology
2503 WALNUT ST STE 200
Boulder, CO 80302
  • Reassigned Medicare billing, Colorado enrollment
  • 314 clinicians in this Medicare group
NPI 1922893478 (720) 494-4700

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95811 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
$137.20 typical visit price
range $60.44 – $180.85
Typical copayment $34.30 (range $15.11 – $45.21)
Most-billed visit code 99204
Established Patient
$105.95 typical visit price
range $19.88 – $148.15
Typical copayment $26.48 (range $4.97 – $37.03)
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.

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 Kristin Mills's NPI number?

The NPI number for Kristin Mills is 1851602536. It was assigned to this individual provider in the NPPES registry on June 28, 2010.

Where is Kristin Mills located?

Kristin Mills practices at Wellspace Health J Street Community Health Center 1820 J Street, Sacramento, CA 95811. The listed phone number is (916) 737-5555.

What is Kristin Mills's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Kristin Mills enrolled in Medicare?

Yes. Kristin Mills is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Kristin Mills's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Kristin Mills reassigns Medicare benefits to Optumcare Colorado Medical Group LLC (Boulder, CO). The 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 Kristin Mills'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 Kristin Mills was last updated on September 6, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.