Krystal W Nizar, M.D., PH.D.
Psychiatry · Iowa City, IA
At a glance
450 Highway 1 W # 115, Iowa City, IA 52246-4204
NPPES record updated Sep 8, 2020. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
450 Highway 1 W # 115Iowa City, IA 52246-4204
Additional reported practice locations
375 89Th StDaly City, CA 940151802
Phone: 6503018755
Fax: 6503018639 200 Hawkins Dr
Iowa City, IA 522421009
Phone: 3193561616
Fax: 3193562587
Education & affiliations
- Medical / professional school
- University Of California, San Diego School Of Medicine
- Graduation year
- 2012
- CMS specialties
- Psychiatry
Practice groups
Reported hospital affiliations
- Mercy Medical Center - Cedar Rapids Cedar Rapids, IA
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Service-mix comparison is unavailable for this NPI in the imported Medicare service file.
Industry-reported general payments
No matching general-payment summary in the imported release. This is not a verified zero and does not rule out other payment types or years.
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Psychiatry
- Taxonomy code
- 2084P0800X
- Enumeration date
- Apr 6, 2012
- Record updated
- Sep 8, 2020
More registry details
- Provider type
- Individual · Type 1
- Other reported name
- KRYSTAL W CHIAO
- Reported credentials
- M.D., PH.D.
Reported taxonomies and licenses
2084P0800X
License reported: A126783 CA
2084P0800X · Primary
License reported: MD-45892 IA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
450 Highway 1 W # 115Iowa City, IA 52246-4204
- Phone
- (319) 435-1720
- Fax
- (620) 670-8407
Mailing address
450 HIGHWAY 1 W # 115IOWA CITY, IA 522464204
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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