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DR. ALEX GORDON SIEG MD
NPI 1417449570
Internal Medicine in Davenport, IA

Active since June 05, 2018PECOS EnrolledAccepts Medicare Assignment
1401 W CENTRAL PARK AVE, DAVENPORT, IA 52804(563) 421-1900 Get Directions Write a Review

NPPES record last updated: July 22, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Alex Gordon Sieg Md NPPES

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

DR. ALEX GORDON SIEG MD (NPI 1417449570) is an individual internal medicine provider in Davenport, Iowa, licensed in Iowa (MD-48607) and active in the NPI registry since June 2018. He is enrolled in Medicare PECOS, is affiliated with Genesis Hlth System Dba Genesis Mdl Ctr-illini, and maintains a secondary practice location in Iowa City.

NPPES Registry Identity

NPI1417449570
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. ALEX GORDON SIEGCredential: MD
Location Address1401 W CENTRAL PARK AVEDavenport, IA 52804-1707
Mailing Address1351 W Central Park Ave Ste 4100Davenport, IA 52804-1847 · (563) 421-2641
Phone(563) 421-1900
Sole ProprietorNo
Medical School CMSIndiana University School Of MedicineGraduated 2018
Enumeration DateJune 5, 2018
Last NPPES UpdateJuly 22, 2024
NPPES CertifiedJuly 22, 2024
✔ NPI 1417449570 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in IA · MD-48607
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.
1401 W CENTRAL PARK AVE, Davenport, IA 52804
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Secondary Practice Location 1

Location 1200 Hawkins DrIowa City, IA 52242-1009 · Phone (563) 676-1528

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. Alex Gordon Sieg 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 ID7517216054
PECOS Enrollment IDI20240913002627
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

2

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

Genesis Health System
1.9 mi
Surgery
1227 E RUSHOLME ST
Davenport, IA 52803
  • Reassigned Medicare billing, Iowa enrollment
  • 358 clinicians in this Medicare group
NPI 1528616901 (563) 421-3408
Mercy Specialty Clinic
20 mi
Family Medicine
1021 11TH ST
De Witt, IA 52742
  • Reassigned Medicare billing, Iowa enrollment
  • 183 clinicians in this Medicare group
NPI 1235793829 (563) 659-9294

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 5

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.
372 services163 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.
106 services106 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.
32 services32 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.
24 services24 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.
11 services11 patients

Hospital Affiliations CMS Care Compare 5

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

Genesis Hlth System Dba Genesis Mdl Ctr-Illini

Acute Care Hospitals · Silvis, IL
2/5 CMS rating
OwnershipGovernment - Local
CMS Certification Number140275
Location801 Illini DrSilvis, IL 61282 · Rock Island County
Emergency services Birthing friendly

Genesis Medical Center, Aledo

Critical Access Hospitals · Aledo, IL
OwnershipVoluntary non-profit - Private
CMS Certification Number141304
Location409 NW 9th AvenueAledo, IL 61231 · Mercer County
Emergency services

Genesis Medical Center-Davenport

Acute Care Hospitals · Davenport, IA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number160033
Location1227 East Rusholme StreetDavenport, IA 52803 · Scott County
Emergency services Birthing friendly

Mercyone Clinton Medical Center

Acute Care Hospitals · Clinton, IA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number160080
Location1410 North 4th StreetClinton, IA 52732 · Clinton County
Emergency services Birthing friendly

Genesis Medical Center-Dewitt

Critical Access Hospitals · Dewitt, IA
OwnershipVoluntary non-profit - Private
CMS Certification Number161313
Location1118 11th StreetDewitt, IA 52742 · Clinton County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 52804 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 14

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

DR. CHRISTINE M SHARIS MD
Radiology (Radiation Oncology)
1401 W CENTRAL PARK AVE
DAVENPORT, IA 52804
Scott County (563) 421-1900
CIACCIO MEDICAL, P.C.
Psychiatry & Neurology (Psychiatry)
1401 W CENTRAL PARK AVE
DAVENPORT, IA 52804
Scott County (309) 236-8075
DR. ANTONIO P VIGLIOTTI MD
Radiology (Radiation Oncology)
1401 W CENTRAL PARK AVE
DAVENPORT, IA 52804
Scott County (563) 421-1900
STEPHEN C RASMUS MD PC
Psychiatry & Neurology (Sleep Medicine)
1401 W CENTRAL PARK AVE
DAVENPORT, IA 52804
Scott County (563) 349-0759
MRS. NATALIE REITZ MSN, ARNP, FNP-C
Nurse Practitioner (Family)
1401 W CENTRAL PARK AVE
DAVENPORT, IA 52804
Scott County (563) 421-1000
GENESIS HEALTH SYSTEM
Rehabilitation Unit
1401 W CENTRAL PARK AVE
DAVENPORT, IA 52804
Scott County (563) 421-3402
FAREEDUDDIN AHMED MD
Physical Medicine & Rehabilitation
1401 W CENTRAL PARK AVE
DAVENPORT, IA 52804
Scott County (563) 421-1000
REBEKKA JACOBS LMSW
Social Worker
1401 W CENTRAL PARK AVE
DAVENPORT, IA 52804
Scott County (563) 421-2971

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 Alex Sieg's NPI number?

The NPI number for Alex Sieg is 1417449570. It was assigned to this individual provider in the NPPES registry on June 5, 2018.

Where is Alex Sieg located?

Alex Sieg practices at 1401 W Central Park Ave, Davenport, IA 52804. The listed phone number is (563) 421-1900.

What is Alex Sieg's specialty?

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

Is Alex Sieg enrolled in Medicare?

Yes. Alex Sieg 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 Alex Sieg's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alex Sieg reassigns Medicare benefits to 2 organizations: Genesis Health System (Davenport, IA) and Mercy Specialty Clinic (De Witt, 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 Alex Sieg's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Alex Sieg 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 Alex Sieg 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 Alex Sieg affiliated with any hospitals?

According to CMS data, Alex Sieg is affiliated with Genesis Hlth System Dba Genesis Mdl Ctr-Illini, Genesis Medical Center, Aledo, Genesis Medical Center-Davenport, Mercyone Clinton Medical Center and Genesis Medical Center-Dewitt.

When was this NPI record last updated?

The NPPES record for Alex Sieg was last updated on July 22, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.