MARIKO HAGIWARA M.D.
NPI 1679899157
Hospitalist in Iowa City, IA

Active since April 09, 2010PECOS EnrolledAccepts Medicare Assignment
200 HAWKINS DR, IOWA CITY, IA 52242(319) 356-1616 Get Directions Write a Review

NPPES record last updated: April 9, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Apr 9, 2025, Jul 21, 2022, Mar 17, 2018 and 1 more (4 updates tracked since 2017).

About Mariko Hagiwara M.d. NPPES

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

MARIKO HAGIWARA M.D. (NPI 1679899157) is an individual hospitalist provider in Iowa City, Iowa, licensed in Iowa (MD-44493) and active in the NPI registry since April 2010. She is enrolled in Medicare PECOS, is affiliated with University Of Iowa Hospital & Clinics, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1679899157
Entity TypeIndividualFemale
Primary Taxonomy208M00000X
Provider Legal NameMARIKO HAGIWARACredential: M.D.
Location Address200 HAWKINS DRIowa City, IA 52242-1009
Mailing Address200 Hawkins DrIowa City, IA 52242-1009 · (319) 356-1616
Sole ProprietorNo
Medical School CMSOtherGraduated 2004
Enumeration DateApril 9, 2010
Last NPPES UpdateApril 9, 20254 updates tracked since enumeration
NPPES CertifiedApril 9, 2025
NPI 1679899157 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians
Taxonomy Code208M00000X
Licenses Licensed in IA · MD-44493 Licensed in TX · P8360
Definition
Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.
Also ListedInternal MedicineTaxonomy 207R00000X · License MD-44493 (IA)
200 HAWKINS DR, Iowa City, IA 52242

Other Names 1

Former Name (1)Mariko Saso-hagiwara

Secondary Practice Locations 2

Location 1520 Madison Oak DrSan Antonio, TX 78258-3913 · Phone (210) 297-4000
Location 2701 W Forevergreen RdNorth Liberty, IA 52317-9848 · Phone (319) 356-4019 · Fax (319) 356-3949

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Mariko Hagiwara 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 ID6103054952
PECOS Enrollment IDI20170824001985
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.

Areas of Expertise CMS Part B claims 2

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
295 services134 patients
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.
84 services80 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

University Of Iowa Hospital & Clinics

Acute Care Hospitals · Iowa City, IA
3/5 CMS rating
OwnershipGovernment - State
CMS Certification Number160058
Location200 Hawkins DriveIowa City, IA 52242 · Johnson County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 52242 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
$122.23 typical visit price
range $52.96 – $161.40
Typical copayment $30.55 (range $13.24 – $40.35)
Most-billed visit code 99204
Established Patient
$94.05 typical visit price
range $16.91 – $131.98
Typical copayment $23.51 (range $4.22 – $32.99)
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.

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.

Emergency Medicine
200 HAWKINS DR
IOWA CITY, IA 52242
Internal Medicine (Gastroenterology)
200 HAWKINS DR
IOWA CITY, IA 52242
Internal Medicine (Hematology & Oncology)
200 HAWKINS DR, DEPT OF INTERNAL MEDICINE
IOWA CITY, IA 52242
Internal Medicine (Critical Care Medicine)
200 HAWKINS DR
IOWA CITY, IA 52242
Chronic Disease Hospital
200 HAWKINS DR
IOWA CITY, IA 52242
Genetic Counselor, MS
200 HAWKINS DR, 31663 PFP
IOWA CITY, IA 52242
Obstetrics & Gynecology
200 HAWKINS DR, DEPT OF OBGYN
IOWA CITY, IA 52242
Health Educator
200 HAWKINS DR, 0733 JPP
IOWA CITY, IA 52242

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 Mariko Hagiwara's NPI number?

The NPI number for Mariko Hagiwara is 1679899157. It was assigned to this individual provider in the NPPES registry on April 9, 2010. The provider is also known as Mariko Saso-Hagiwara.

Where is Mariko Hagiwara located?

Mariko Hagiwara practices at 200 Hawkins Dr, Iowa City, IA 52242. The listed phone number is (319) 356-1616.

What is Mariko Hagiwara's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Is Mariko Hagiwara enrolled in Medicare?

Yes. Mariko Hagiwara 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.

What insurance does Mariko Hagiwara accept?

Health plans from Blue Cross and Blue Shield of Texas, Medica and Sanford Health Plan list Mariko Hagiwara 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.

Is Mariko Hagiwara affiliated with any hospitals?

According to CMS data, Mariko Hagiwara is affiliated with University Of Iowa Hospital & Clinics.

When was this NPI record last updated?

The NPPES record for Mariko Hagiwara was last updated on April 9, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.