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DR. JOHN STEVEN LAMMERT MD
NPI 1699727909
Internal Medicine in Woodstock, GA

Active since May 16, 2006PECOS EnrolledAccepts Medicare Assignment
900 TOWNE LAKE PKWY STE 210, WOODSTOCK, GA 30189(770) 592-2300(770) 592-2040 Get Directions Write a Review

NPPES record last updated: October 17, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. John Steven Lammert Md NPPES

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

DR. JOHN STEVEN LAMMERT MD (NPI 1699727909) is an individual internal medicine provider in Woodstock, Georgia, licensed in Georgia (33619) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Northside Hospital Cherokee, and is a graduate of Medical College Of Georgia School Of Medicine (1989).

NPPES Registry Identity

NPI1699727909
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. JOHN STEVEN LAMMERTCredential: MD
Location Address900 TOWNE LAKE PKWY STE 210Woodstock, GA 30189-1603
Mailing Address900 Towne Lake Pkwy Ste 210Woodstock, GA 30189-1603 · (770) 592-2300 · Fax (770) 592-2040
Phone(770) 592-2300
Fax(770) 592-2040
Sole ProprietorNo
Medical School CMSMedical College Of Georgia School Of MedicineGraduated 1989
Enumeration DateMay 16, 2006
Last NPPES UpdateOctober 17, 2025
NPPES CertifiedOctober 17, 2025
✔ NPI 1699727909 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 · 33619
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.
900 TOWNE LAKE PKWY STE 210, Woodstock, GA 30189
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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, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. John Steven Lammert 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 ID2668499708
PECOS Enrollment IDI20051028000259
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.

Areas of Expertise CMS Part B claims 9

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 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.
282 services206 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.
225 services159 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.
134 services134 patients
Influenza vaccine split virus, preservative free 90662
The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.
30 services29 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
30 services29 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 services22 patients

Hospital Affiliations CMS Care Compare 3

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

Northside Hospital Cherokee

Acute Care Hospitals · Canton, GA
4/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number110008
Location450 Northside Cherokee BoulevardCanton, GA 30115 · Cherokee County
Emergency services Birthing friendly

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 30189 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.

Other Providers at the Same Location NPPES 2

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

DR. SAMANTHA LIANE GRANT MBBS
Family Medicine
900 TOWNE LAKE PKWY STE 210
WOODSTOCK, GA 30189
Cherokee County (770) 592-2300
STACY ARRINGTON STEWART DO
Family Medicine
900 TOWNE LAKE PKWY STE 210
WOODSTOCK, GA 30189
Cherokee County (770) 592-2300

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 John Lammert's NPI number?

The NPI number for John Lammert is 1699727909. It was assigned to this individual provider in the NPPES registry on May 16, 2006.

Where is John Lammert located?

John Lammert practices at 900 Towne Lake Pkwy Ste 210, Woodstock, GA 30189. The listed phone number is (770) 592-2300.

What is John Lammert's specialty?

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

Is John Lammert enrolled in Medicare?

Yes. John Lammert 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.

What insurance does John Lammert accept?

Health plans from Ambetter Health, Ambetter from Absolute Total Care, Ambetter of Alabama, Ambetter of North Carolina and Ambetter of Tennessee list John Lammert 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 John Lammert affiliated with any hospitals?

According to CMS data, John Lammert is affiliated with Northside Hospital Cherokee, Wellstar Kennestone Regional Medical Center and Northside Hospital.

When was this NPI record last updated?

The NPPES record for John Lammert was last updated on October 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.