DR. DARREN LESLIE CROO M.D.
NPI 1164764999
Surgery in Williamsburg, MI

Q: What is Darren Croo's NPI number?

The NPI number for Darren Croo is 1164764999. It was assigned to this individual provider in the NPPES registry on March 19, 2013.

Q: What is Darren Croo's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Q: When was this NPI record last updated?

The NPPES record for Darren Croo was last updated on March 19, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.

Active since March 19, 2013PECOS EnrolledAccepts Medicare Assignment

3874 PLEASANT RIDGE DR, WILLIAMSBURG, MI 49690(231) 645-2681 Get Directions Write a Review

NPPES record last updated: March 19, 2013. Verified against the NPPES registry weekly; last sync: November 01, 2026.

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About Dr. Darren Leslie Croo M.d. NPPES

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

DR. DARREN LESLIE CROO M.D. (NPI 1164764999) is an individual surgery provider in Williamsburg, Michigan, licensed in Nebraska (110265) and active in the NPI registry since March 2013. He is enrolled in Medicare PECOS, is affiliated with Trinity Regional Medical Center, and is a graduate of Wayne State University School Of Medicine (2013).

NPPES Registry Identity

NPI1164764999

Entity TypeIndividualMale

Primary Taxonomy208600000X

Provider Legal NameDR. DARREN LESLIE CROOCredential: M.D.

Location Address3874 PLEASANT RIDGE DRWilliamsburg, MI 49690-9323

Mailing Address3874 Pleasant Ridge DrWilliamsburg, MI 49690-9323 · (231) 645-2681

Phone(231) 645-2681

Sole ProprietorYes

Medical School CMSWayne State University School Of MedicineGraduated 2013

Enumeration DateMarch 19, 2013

✔ NPI 1164764999 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208600000X

License✔ Licensed in NE · 110265

Definition

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

3874 PLEASANT RIDGE DR, Williamsburg, MI 49690

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Insurance Company, Wellmark Health Plan of Iowa, Inc..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. Darren Leslie Croo 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 ID446473292

PECOS Enrollment IDI20180713002474

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 Darren Croo reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Iowa Physicians Clinic Medical Foundation

363 mi

General Practice

1518 MULBERRY AVENUE
Muscatine, IA 52761

Reassigned Medicare billing, Iowa enrollment
1,506 clinicians in this Medicare group

NPI 1982831426 (515) 471-9300

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 15

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.

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

52 services52 patients

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

47 services47 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.

43 services25 patients

Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk G0121

Colorectal cancer screening, such as a colonoscopy, is a preventive measure to detect early signs of cancer in the large intestine. For individuals not at high risk, it's typically recommended at age 50. A small, flexible tube with a camera is used to examine your colon. It's a safe, effective way to catch issues early.

38 services38 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

37 services37 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.

31 services30 patients

Diagnostic exam of large bowel using a flexible endoscope 45378

This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.

27 services26 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.

27 services27 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.

27 services24 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.

22 services18 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

19 services19 patients

Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43235

This procedure, known as an upper endoscopy, involves inserting a thin, flexible tube with a camera down the throat to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like ulcers or inflammation.

18 services18 patients

Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito G0500

Moderate sedation is a method where a physician uses medication to help you relax during a gastrointestinal endoscopy. An independent trained observer will be present to monitor your vital signs and ensure your safety throughout the procedure. It's a common and safe practice.

17 services17 patients

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.

15 services15 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.

12 services12 patients

Hospital Affiliations CMS Care Compare 3

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

Trinity Regional Medical Center

Acute Care Hospitals · Fort Dodge, IA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number160016

Location802 Kenyon RdFort Dodge, IA 50501 · Webster County

Emergency services Birthing friendly

Humboldt County Memorial Hospital

Critical Access Hospitals · Humboldt, IA

OwnershipVoluntary non-profit - Other

CMS Certification Number161334

Location1000 North 15th StreetHumboldt, IA 50548 · Humboldt County

Emergency services

Loring Hospital

Critical Access Hospitals · Sac City, IA

OwnershipVoluntary non-profit - Private

CMS Certification Number161370

Location211 Highland Avenue PO Box 217Sac City, IA 50583 · Sac County

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 49690 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

$84.74 typical visit price

range $54.34 – $166.68

Typical copayment $21.18 (range $13.58 – $41.67)

Most-billed visit code 99203

Established Patient

$68.07 typical visit price

range $17.09 – $135.40

Typical copayment $17.01 (range $4.27 – $33.85)

Most-billed visit code 99213

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 Darren Croo's NPI number?

The NPI number for Darren Croo is 1164764999. It was assigned to this individual provider in the NPPES registry on March 19, 2013.

Where is Darren Croo located?

Darren Croo practices at 3874 Pleasant Ridge Dr, Williamsburg, MI 49690. The listed phone number is (231) 645-2681.

What is Darren Croo's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Darren Croo enrolled in Medicare?

Yes. Darren Croo 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 organization bills Medicare for Darren Croo's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Darren Croo reassigns Medicare benefits to Iowa Physicians Clinic Medical Foundation (Muscatine, IA). 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 Darren Croo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Darren Croo accept?

Health plans from Oscar Insurance Company and Wellmark Health Plan of Iowa, Inc. list Darren Croo 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 Darren Croo affiliated with any hospitals?

According to CMS data, Darren Croo is affiliated with Trinity Regional Medical Center, Humboldt County Memorial Hospital and Loring Hospital.

When was this NPI record last updated?

The NPPES record for Darren Croo was last updated on March 19, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.