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DR. SARAH JOHANNA CARSTENS M.D.
NPI 1952506867
Internal Medicine in Phoenix, AZ

Active since June 19, 2007PECOS EnrolledAccepts Medicare Assignment
92.28/100
CMS Quality Rating
8913 N 19TH AVE, PHOENIX, AZ 85021(602) 858-4361(480) 906-2176 Get Directions Write a Review

NPPES record last updated: August 20, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Sarah Johanna Carstens M.d. NPPES

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

DR. SARAH JOHANNA CARSTENS M.D. (NPI 1952506867) is an individual internal medicine provider in Phoenix, Arizona, licensed in Arizona (43273) and active in the NPI registry since June 2007. She is enrolled in Medicare PECOS, maintains a secondary practice location in Phoenix, and is a graduate of University Of Arizona College Of Medicine (2007).

NPPES Registry Identity

NPI1952506867
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. SARAH JOHANNA CARSTENSCredential: M.D.
Location Address8913 N 19TH AVEPhoenix, AZ 85021-4206
Mailing Address102 Woodmont Blvd Ste 600Nashville, TN 37205-5250 · (888) 987-1151
Phone(602) 858-4361
Fax(480) 906-2176
Sole ProprietorYes
Medical School CMSUniversity Of Arizona College Of MedicineGraduated 2007
Enumeration DateJune 19, 2007
Last NPPES UpdateAugust 20, 2026
NPPES CertifiedAugust 20, 2026
✔ NPI 1952506867 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in AZ · 43273
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedHospitalistTaxonomy 208M00000X · License 43273 (AZ)
8913 N 19TH AVE, Phoenix, AZ 85021
Open in Google Maps ↗

Secondary Practice Location 1

Location 11111 E McDowell RdPhoenix, AZ 85006-2612 · Phone (602) 000-0000

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter Health, Blue Cross Blue Shield of Arizona and more.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. Sarah Johanna Carstens 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.

PECOS PAC ID3072638543
PECOS Enrollment IDI20100921000899
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 Reassignments

4

Medicare enrollment records show Sarah Carstens reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Circle The City
5.0 mi
Family Medicine
333 W INDIAN SCHOOL RD
Phoenix, AZ 85013
  • Reassigned Medicare billing, Arizona enrollment
  • 49 clinicians in this Medicare group
NPI 1346588316 (602) 776-9000
Banner - University Hospital Based Physicians LLC
6.0 mi
General Acute Care Hospital
2901 N CENTRAL AVE STE 160
Phoenix, AZ 85012
  • Reassigned Medicare billing, Arizona enrollment
  • 728 clinicians in this Medicare group
NPI 1750751566 (602) 747-4000
Banner Cancer Center Specialists LLC
6.0 mi
Oncology
2901 N CENTRAL AVE STE 160
Phoenix, AZ 85012
  • Reassigned Medicare billing, Arizona enrollment
  • 470 clinicians in this Medicare group
NPI 1518253152 (602) 747-4000
Banner Hospital Based Physicians Arizona LLC
25 mi
Multi-Specialty
1900 N HIGLEY RD
Gilbert, AZ 85234
  • Reassigned Medicare billing, Arizona enrollment
  • 1,081 clinicians in this Medicare group
NPI 1124374822 (480) 543-2034

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

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.

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
15 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85021 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
$127.71 typical visit price
range $55.44 – $168.60
Typical copayment $31.92 (range $13.86 – $42.15)
Most-billed visit code 99204
Established Patient
$98.00 typical visit price
range $17.72 – $137.41
Typical copayment $24.50 (range $4.43 – $34.35)
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.

92.28/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Promoting Interoperability100
Improvement Activities40
Cost51.21

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
1 supplier11 claims11 services$14.85 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
1 supplier11 claims11 services$67.67 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 5

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

PARWIN SHETAB SADAAT MD
Family Medicine
8913 N 19TH AVE
PHOENIX, AZ 85021
Maricopa County (602) 858-4361
DR. GLENDA GAYLE WILLIAMS M.D.
Internal Medicine
8913 N 19TH AVE
PHOENIX, AZ 85021
Maricopa County (602) 858-4361
ERICA SIMMONS NP
Nurse Practitioner (Primary Care)
8913 N 19TH AVE
PHOENIX, AZ 85021
Maricopa County (602) 858-4361
CHRISTINA SUMMERS FNP-C
Nurse Practitioner (Family)
8913 N 19TH AVE
PHOENIX, AZ 85021
Maricopa County (602) 858-4361
ELENA AMINOV
Nurse Practitioner (Gerontology)
8913 N 19TH AVE
PHOENIX, AZ 85021
Maricopa County (602) 858-4361

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 Sarah Carstens's NPI number?

The NPI number for Sarah Carstens is 1952506867. It was assigned to this individual provider in the NPPES registry on June 19, 2007.

Where is Sarah Carstens located?

Sarah Carstens practices at 8913 N 19th Ave, Phoenix, AZ 85021. The listed phone number is (602) 858-4361.

What is Sarah Carstens's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Sarah Carstens enrolled in Medicare?

Yes. Sarah Carstens 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 Sarah Carstens's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sarah Carstens reassigns Medicare benefits to 4 organizations: Circle The City (Phoenix, AZ), Banner - University Hospital Based Physicians LLC (Phoenix, AZ), Banner Cancer Center Specialists LLC (Phoenix, AZ) and Banner Hospital Based Physicians Arizona LLC (Gilbert, AZ). 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 Sarah Carstens's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Sarah Carstens accept?

Health plans from Ambetter Health, Ambetter from Arizona Complete Health, Blue Cross Blue Shield of Arizona and UnitedHealthcare list Sarah Carstens 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 Sarah Carstens was last updated on August 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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.