DR. SANDRA LETICIA REIS CROSARA MD
NPI 1922319656
Internal Medicine - Infectious Disease in Mason City, IA

Q: What is Sandra Leticia Crosara's NPI number?

The NPI number for Sandra Leticia Crosara is 1922319656. It was assigned to this individual provider in the NPPES registry on June 28, 2010. The provider is also known as Sandra Leticia Reis Crosara MD.

Q: What is Sandra Leticia Crosara's specialty?

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

Active since June 28, 2010PECOS EnrolledAccepts Medicare Assignment

1000 4TH ST SW, MASON CITY, IA 50401(641) 428-6999(641) 428-6678 Get Directions Write a Review

NPPES record last updated: July 8, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 8, 2025, Apr 20, 2021, Aug 5, 2020 and 4 more (7 updates tracked since 2016).

On this page

About Dr. Sandra Leticia Reis Crosara Md NPPES

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

DR. SANDRA LETICIA REIS CROSARA MD (NPI 1922319656) is an individual infectious disease provider in Mason City, Iowa, licensed in Iowa (MD42153) and active in the NPI registry since June 2010. She is enrolled in Medicare PECOS, is affiliated with Mercyone North Iowa Medical Center, and is a graduate of Other (1999).

NPPES Registry Identity

NPI1922319656

Entity TypeIndividualFemale

Primary Taxonomy207RI0200X

Provider Legal NameDR. SANDRA LETICIA REIS CROSARACredential: MD

Location Address1000 4TH ST SWMason City, IA 50401

Mailing Address621 S Illinois Ave Ste 103Mason City, IA 50401-5489 · (641) 428-3041 · Fax (641) 428-3059

Phone(641) 428-6999

Fax(641) 428-6678

Sole ProprietorNo

Medical School CMSOtherGraduated 1999

Enumeration DateJune 28, 2010

Last NPPES UpdateJuly 8, 20257 updates tracked since enumeration

NPPES CertifiedJuly 8, 2025

✔ NPI 1922319656 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 IA · MD42153

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 R9307 (IA)

1000 4TH ST SW, Mason City, IA 50401

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Other Names 1

Professional Name (2)Sandra Leticia Reis Crosara Md

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from NH Healthy Families, Ambetter from Sunflower Health Plan, Ambetter Health 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. Sandra Leticia Reis Crosara 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.

PECOS PAC ID8921221979

PECOS Enrollment IDI20150623001634

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

Medicare enrollment records show Sandra Leticia Crosara reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

North Iowa Mercy Clinics

Same address

Nurse Practitioner

1000 4TH ST SW
Mason City, IA 50401

Reassigned Medicare billing, Iowa enrollment
420 clinicians in this Medicare group

NPI 1043321102 (641) 428-5932

Mason City Clinic PC

0.1 mi

Otolaryngology

250 S CRESCENT DR
Mason City, IA 50401

Reassigned Medicare billing, Iowa enrollment
65 clinicians in this Medicare group

NPI 1043254055 (800) 622-1411

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 13

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

145 services79 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

94 services65 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

71 services50 patients

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231

Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.

64 services48 patients

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.

59 services37 patients

Removal of tissue from wound, 20.0 sq cm or less 97597

This procedure involves the careful removal of damaged or infected tissue from a wound that's 20.0 square cm or less. It's done to promote healing and prevent further infection. The process is carried out under local anesthesia, ensuring minimal discomfort.

54 services22 patients

Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes 99221

Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.

52 services51 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

48 services46 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

45 services28 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

38 services25 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.

20 services20 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

14 services14 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

12 services12 patients

Hospital Affiliations CMS Care Compare 5

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

Mercyone North Iowa Medical Center

Acute Care Hospitals · Mason City, IA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number160064

Location1000 Fourth Street SWMason City, IA 50401 · Cerro Gordo County

Emergency services Birthing friendly

Mitchell County Regional Health

Critical Access Hospitals · Osage, IA

OwnershipGovernment - Local

CMS Certification Number161323

Location616 North Eighth StreetOsage, IA 50461 · Mitchell County

Emergency services

Mercy Medical Center-New Hampton

Critical Access Hospitals · New Hampton, IA

OwnershipVoluntary non-profit - Church

CMS Certification Number161331

Location308 North Maple AvenueNew Hampton, IA 50659 · Chickasaw County

Emergency services

Floyd County Medical Center

Critical Access Hospitals · Charles City, IA

3/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number161347

Location800 11th StCharles City, IA 50616 · Floyd County

Emergency services Birthing friendly

Kossuth Regional Health Center

Critical Access Hospitals · Algona, IA

1/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number161353

Location1515 South Phillips StreetAlgona, IA 50511 · Kossuth County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 50401 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.

LINDA S VOLD LISW

Social Worker (Clinical)

1000 4TH ST SW, SUITE BS
MASON CITY, IA 50401

Cerro Gordo County (641) 422-7797

BURT HUMBURG MD

Internal Medicine

1000 4TH ST SW
MASON CITY, IA 50401

Cerro Gordo County (641) 428-7000

SUMATHY NAGRAJ IYENGAR M.D.,

Hospitalist

1000 4TH ST SW, MERCY MEDICAL CENTER-HOSPITALIST DEPT
MASON CITY, IA 50401

Cerro Gordo County (641) 428-7000

DR. SATINDERJIT SINGH M.D.

Emergency Medicine

1000 4TH ST SW
MASON CITY, IA 50401

Cerro Gordo County (641) 428-7234

ASHLEY MATERN ARNP

Nurse Practitioner (Family)

1000 4TH ST SW
MASON CITY, IA 50401

Cerro Gordo County (641) 428-6999

ROBERT D. FROEHNER CRNA

Nurse Anesthetist, Certified Registered

1000 4TH ST SW
MASON CITY, IA 50401

Cerro Gordo County (641) 422-7000

DR. THOMAS P DELANEY MD

Hospitalist

1000 4TH ST SW, SUITE HOSP
MASON CITY, IA 50401

Cerro Gordo County (641) 422-7000

NORTH IOWA MERCY CLINICS

Nurse Practitioner

1000 4TH ST SW
MASON CITY, IA 50401

Cerro Gordo County (641) 428-5932

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 Sandra Leticia Crosara's NPI number?

The NPI number for Sandra Leticia Crosara is 1922319656. It was assigned to this individual provider in the NPPES registry on June 28, 2010. The provider is also known as Sandra Leticia Reis Crosara MD.

Where is Sandra Leticia Crosara located?

Sandra Leticia Crosara practices at 1000 4th St SW, Mason City, IA 50401. The listed phone number is (641) 428-6999.

What is Sandra Leticia Crosara's specialty?

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

Is Sandra Leticia Crosara enrolled in Medicare?

Yes. Sandra Leticia Crosara 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 Sandra Leticia Crosara's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sandra Leticia Crosara reassigns Medicare benefits to 2 organizations: North Iowa Mercy Clinics (Mason City, IA) and Mason City Clinic PC (Mason City, IA). 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 Sandra Leticia Crosara's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Sandra Leticia Crosara accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from NH Healthy Families, Ambetter from Sunflower Health Plan and Oscar Health and 2 other insurers list Sandra Leticia Crosara 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 Sandra Leticia Crosara affiliated with any hospitals?

According to CMS data, Sandra Leticia Crosara is affiliated with Mercyone North Iowa Medical Center, Mitchell County Regional Health, Mercy Medical Center-New Hampton, Floyd County Medical Center and Kossuth Regional Health Center.

When was this NPI record last updated?

The NPPES record for Sandra Leticia Crosara was last updated on July 8, 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.