1. Home
  2. Directory
  3. Georgia
  4. Marietta
  5. Internal Medicine
  6. NPI Profile

DR. SIDNEY CHASTANG MD
NPI 1720077225
Internal Medicine in Marietta, GA

Active since October 18, 2005PECOS Enrolled
1121 JOHNSON FERRY RD STE 205, MARIETTA, GA 30068(770) 485-3837(470) 377-4468 Get Directions Write a Review

NPPES record last updated: April 16, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Sidney Chastang Md NPPES

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

DR. SIDNEY CHASTANG MD (NPI 1720077225) is an individual internal medicine provider in Marietta, Georgia, licensed in Georgia (041094) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS, is affiliated with Wellstar Kennestone Regional Medical Center, and is a graduate of University Of Alabama School Of Medicine (1992).

NPPES Registry Identity

NPI1720077225
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. SIDNEY CHASTANGCredential: MD
Location Address1121 JOHNSON FERRY RD STE 205Marietta, GA 30068-5425
Mailing Address1121 Johnson Ferry Rd Ste 205Marietta, GA 30068-5425
Phone(770) 485-3837
Fax(470) 377-4468
Sole ProprietorYes
Medical School CMSUniversity Of Alabama School Of MedicineGraduated 1992
Enumeration DateOctober 18, 2005
Last NPPES UpdateApril 16, 2025
NPPES CertifiedApril 16, 2025
✔ NPI 1720077225 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in GA · 041094
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.
1121 JOHNSON FERRY RD STE 205, Marietta, GA 30068
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Absolute Total Care, Ambetter Health, Ambetter of Alabama 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 (PECOS)

Dr. Sidney Chastang Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID8921021064
PECOS Enrollment IDI20060104000573
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 Sidney Chastang reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Optimal Health Care, LLC
Same address
Internal Medicine
1121 JOHNSON FERRY RD, SUITE 205
Marietta, GA 30068
  • Reassigned Medicare billing, Georgia enrollment
NPI 1255776134 (770) 485-3837

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 6

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.

Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
86 services58 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.
72 services43 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.
61 services45 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
31 services31 patients
Annual depression screening, 5 to 15 minutes G0444
An annual depression screening is a short, routine evaluation to check for signs of depression. It involves answering a series of questions about your feelings, thoughts, and behaviors. The process takes about 15 minutes and helps detect depression early for better management.
26 services26 patients
Urinalysis, manual test 81002
A urinalysis is a simple, non-invasive test that checks the urine for various elements such as sugar, protein, and signs of infection. It can help detect many common conditions, including kidney disease and diabetes. The manual test involves a lab technician examining a urine sample.
25 services24 patients

Hospital Affiliations CMS Care Compare 3

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

Wellstar Kennestone Regional Medical Center

Acute Care Hospitals · Marietta, GA
4/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number110035
Location677 Church StreetMarietta, GA 30060 · Cobb County
Emergency services Birthing friendly

Northside Hospital

Acute Care Hospitals · Atlanta, GA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number110161
Location1000 Johnson Ferry Road, NEAtlanta, GA 30342 · Fulton County
Birthing friendly

Wellstar North Fulton Hospital

Acute Care Hospitals · Roswell, GA
2/5 CMS rating
OwnershipProprietary
CMS Certification Number110198
Location3000 Hospital BoulevardRoswell, GA 30076 · Fulton County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 30068 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
$130.64 typical visit price
range $56.84 – $172.43
Typical copayment $32.66 (range $14.21 – $43.10)
Most-billed visit code 99204
Established Patient
$100.20 typical visit price
range $18.22 – $140.40
Typical copayment $25.05 (range $4.55 – $35.10)
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.

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 Sidney Chastang's NPI number?

The NPI number for Sidney Chastang is 1720077225. It was assigned to this individual provider in the NPPES registry on October 18, 2005.

Where is Sidney Chastang located?

Sidney Chastang practices at 1121 Johnson Ferry Rd Ste 205, Marietta, GA 30068. The listed phone number is (770) 485-3837.

What is Sidney Chastang's specialty?

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

Is Sidney Chastang enrolled in Medicare?

Yes. Sidney Chastang is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Sidney Chastang's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sidney Chastang reassigns Medicare benefits to Optimal Health Care, LLC (Marietta, GA). 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 Sidney Chastang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Sidney Chastang accept?

Health plans from Ambetter Health, Ambetter from Absolute Total Care, Ambetter of Alabama, Ambetter of North Carolina and Ambetter of Tennessee and 1 other insurer list Sidney Chastang 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 Sidney Chastang affiliated with any hospitals?

According to CMS data, Sidney Chastang is affiliated with Wellstar Kennestone Regional Medical Center, Northside Hospital and Wellstar North Fulton Hospital.

When was this NPI record last updated?

The NPPES record for Sidney Chastang was last updated on April 16, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.