DR. JOHN H MARKS MD
NPI 1346212594
Colon & Rectal Surgery in Wynnewood, PA

NPI Status: Active since February 02, 2006

Contact Information

100 E LANCASTER AVE
SUITE 330 LANKENAU MOB WEST
WYNNEWOOD, PA
ZIP 19096
Phone: (610) 645-9093
Fax: (610) 645-9476

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  • Individual
  • Male
  • Years of Experience 38
  • Colon & Rectal Surgery
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About JOHN MARKS

This page provides the complete NPI Profile along with additional information for John Marks, a provider established in Wynnewood, Pennsylvania with a medical specialization in Colon & Rectal Surgery and more than 38 years of experience. He graduated from Jefferson Medical College Of Thomas Jefferson University in 1989. The healthcare provider is registered in the NPI registry with number 1346212594 assigned on February 2006. The practitioner's primary taxonomy code is 208C00000X with license number MD046073L (PA). The provider is registered as an individual and his NPI record was last updated 11 years ago.

NPI
1346212594
Provider Name
DR. JOHN H MARKS MD
Gender
Male
Entity Type
Individual
Location Address
100 E LANCASTER AVE SUITE 330 LANKENAU MOB WEST WYNNEWOOD, PA 19096
Location Phone
(610) 645-9093
Location Fax
(610) 645-9476
Mailing Address
100 E LANCASTER AVE SUITE 330 LANKENAU MOB WEST WYNNEWOOD, PA 19096
Mailing Phone
(610) 645-9093
Mailing Fax
(610) 645-9476
Medical School Name
JEFFERSON MEDICAL COLLEGE OF THOMAS JEFFERSON UNIVERSITY
Graduation Year
1989
Is Sole Proprietor?
No
Enumeration Date
02-02-2006
Last Update Date
10-21-2015
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Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Colon & Rectal Surgery

Taxonomy Code
208C00000X
Type
Allopathic & Osteopathic Physicians
License No.
MD046073L
License State
PA
Taxonomy Description
A colon and rectal surgeon is trained to diagnose and treat various diseases of the intestinal tract, colon, rectum, anal canal and perianal area by medical and surgical means. This specialist also deals with other organs and tissues (such as the liver, urinary and female reproductive system) involved with primary intestinal disease.

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

*Please verify directly with this provider to make sure your insurance plan is currently accepted.

Additional Identifiers

The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.

Identifier Type / Code Identifier State Identifier Issuer
G19601MEDICARE UPIN (02) 

Medicare Participation & PECOS Enrollment Status

John Marks is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

John Marks is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 3274658877

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20100920001097

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Provider Referred Orders for Durable Medical Equipment, Devices & Supplies

The following list reflects the services, supplies or durable medical equipment ordered by this provider to a DME supplier on behalf of patients. The information below is derived from Medicare claims data and reflects the BETOS category, HCPCS code information and the number times each service was submitted under the Medicare fee-for-service program.

Orthotic Devices

  • DME-Orthotic Devices (DF010N)

    Skin barrier; solid, 4 x 4 or equivalent; each (HCPCS:A4362)

    8 DME suppliers used 48 Medicare Claims 945 Services Paid

  • DME-Orthotic Devices (DF010N)

    Ostomy belt, each (HCPCS:A4367)

    3 DME suppliers used 21 Medicare Claims 33 Services Paid

  • DME-Orthotic Devices (DF010N)

    Ostomy skin barrier, powder, per oz (HCPCS:A4371)

    6 DME suppliers used 41 Medicare Claims 49 Services Paid

  • DME-Orthotic Devices (DF010N)

    Ostomy skin barrier, solid 4 x 4 or equivalent, extended wear, without built-in convexity, each (HCPCS:A4385)

    7 DME suppliers used 69 Medicare Claims 1391 Services Paid

  • DME-Orthotic Devices (DF010N)

    Ostomy pouch, drainable, with barrier attached, with built-in convexity (1 piece), each (HCPCS:A4389)

    4 DME suppliers used 27 Medicare Claims 710 Services Paid

  • DME-Orthotic Devices (DF010N)

    Ostomy deodorant, with or without lubricant, for use in ostomy pouch, per fluid ounce (HCPCS:A4394)

    6 DME suppliers used 38 Medicare Claims 668 Services Paid

  • DME-Orthotic Devices (DF010N)

    Ostomy skin barrier, pectin-based, paste, per ounce (HCPCS:A4406)

    6 DME suppliers used 33 Medicare Claims 134 Services Paid

  • DME-Orthotic Devices (DF010N)

    Ostomy skin barrier, with flange (solid, flexible, or accordion), extended wear, with built-in convexity, 4 x 4 inches or smaller, each (HCPCS:A4407)

    4 DME suppliers used 19 Medicare Claims 500 Services Paid

  • DME-Orthotic Devices (DF010N)

    Ostomy skin barrier, with flange (solid, flexible or accordion), extended wear, without built-in convexity, 4 x 4 inches or smaller, each (HCPCS:A4409)

    4 DME suppliers used 16 Medicare Claims 415 Services Paid

  • DME-Orthotic Devices (DF010N)

    Ostomy pouch, closed, with barrier attached, with filter (1 piece), each (HCPCS:A4416)

    3 DME suppliers used 20 Medicare Claims 1140 Services Paid

  • DME-Orthotic Devices (DF010N)

    Ostomy pouch, closed; for use on barrier with non-locking flange, with filter (2 piece), each (HCPCS:A4419)

    1 DME suppliers used 16 Medicare Claims 1440 Services Paid

  • DME-Orthotic Devices (DF010N)

    Ostomy pouch, drainable; for use on barrier with non-locking flange, with filter (2 piece system), each (HCPCS:A4425)

    3 DME suppliers used 22 Medicare Claims 500 Services Paid

  • DME-Orthotic Devices (DF010N)

    Ostomy pouch, drainable, with extended wear barrier attached, with filter, (1 piece), each (HCPCS:A5056)

    5 DME suppliers used 11 Medicare Claims 190 Services Paid

  • DME-Orthotic Devices (DF010N)

    Ostomy pouch, drainable; with barrier attached, (1 piece), each (HCPCS:A5061)

    3 DME suppliers used 19 Medicare Claims 520 Services Paid

  • DME-Orthotic Devices (DF010N)

    Skin barrier, wipes or swabs, each (HCPCS:A5120)

    10 DME suppliers used 71 Medicare Claims 2347 Services Paid

Durable Medical Equipment

  • DME-Medical/Surgical Supplies (DA000N)

    Tape, waterproof, per 18 square inches (HCPCS:A4452)

    4 DME suppliers used 11 Medicare Claims 480 Services Paid

  • DME-Medical/Surgical Supplies (DA000N)

    Adhesive remover, wipes, any type, each (HCPCS:A4456)

    10 DME suppliers used 83 Medicare Claims 4556 Services Paid

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Biopsy of large bowel using a flexible endoscope

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.

This service was performed 63 times for 63 patients

Biopsy of lower large bowel using a flexible endoscope

A biopsy of the lower large bowel involves using a flexible tube with a camera (endoscope) to examine this part of your digestive tract. Small tissue samples may be taken for further examination to detect any abnormalities.

This service was performed 15 times for 14 patients

Colonoscopy

A colonoscopy is a medical procedure that allows your doctor to examine your colon (the large intestine). It utilizes a thin, flexible tube with a tiny camera on the end, which is inserted through the rectum. This procedure can help identify issues such as polyps, inflammation, or early signs of cancer. It's usually recommended for people over 50 or those with specific risk factors.

This service was performed for 342 patients

Colorectal cancer screening; colonoscopy on individual at high risk

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.

This service was performed 19 times for 19 patients

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

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.

This service was performed 14 times for 14 patients

Diagnostic exam of posterior opening using an endoscope

This procedure involves using a thin, flexible instrument called an endoscope to examine the posterior opening area. It helps detect any abnormal conditions or issues. It's a safe, routine exam performed by a healthcare professional.

This service was performed 13 times for 13 patients

Diagnostic exam of large bowel using a flexible endoscope

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.

This service was performed 34 times for 34 patients

Diagnostic exam of lower portion of large bowel using a flexible endoscope

This procedure, known as a sigmoidoscopy, involves using a flexible tube with a camera to examine the lower part of your large bowel. It helps in identifying issues like inflammation, ulcers, or abnormal growths. It's a safe, minimally invasive procedure.

This service was performed 141 times for 115 patients

Established patient office or other outpatient visit, 20-29 minutes

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.

This service was performed 204 times for 146 patients

Established patient office or other outpatient visit, 30-39 minutes

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.

This service was performed 76 times for 58 patients

Established patient office or other outpatient visit, 40-54 minutes

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.

This service was performed 96 times for 66 patients

Follow-up hospital inpatient care per day, typically 25 minutes

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.

This service was performed 42 times for 16 patients

New patient office or other outpatient visit, 30-44 minutes

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

This service was performed 30 times for 30 patients

New patient office or other outpatient visit, 45-59 minutes

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.

This service was performed 19 times for 19 patients

New patient office or other outpatient visit, 60-74 minutes

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.

This service was performed 58 times for 58 patients

Partial release of large bowel and partial removal of large bowel using an endoscope

This procedure involves using an endoscope, a flexible tube with a camera, to partially release and remove a section of your large bowel. It's a minimally invasive surgery that helps treat conditions like cancer or bowel obstruction.

This service was performed 19 times for 19 patients

Partial removal of small and large bowel with attachment of small and large bowel using an endoscope

This procedure involves the partial removal of sections of your small and large bowel. An endoscope, a thin tube with a camera, aids in the process. The remaining parts of your bowels are then reconnected to restore digestive function.

This service was performed 12 times for 12 patients

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

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.

This service was performed 32 times for 32 patients

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $23.17 for a new patient copayment and $18.61 for an established patient copayment.

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 19096 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99203

  • Average New Patient Price $92.69
  • Minimum New Patient Price $59.88
  • Maximum New Patient Price $180.99
  • Average New Patient Copayment $23.17
  • Minimum New Patient Copayment $14.97
  • Maximum New Patient Copayment $45.24

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99213

  • Average Established Patient Price $74.47
  • Minimum Established Patient Price $19.3
  • Maximum Established Patient Price $147.29
  • Average Established Patient Copayment $18.61
  • Minimum Established Patient Copayment $4.82
  • Maximum Established Patient Copayment $36.82

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

Find Provider Hospital Affiliations - Privileges

Doctors and physicians must apply for hospital privileges to treat patients at hospitals. Find out if your doctor has privileges to practice at your preferred hospital by using the hospital affiliation information below based on recent medical claims.

Hospital affiliation is identified through self-reporting data, inpatient, outpatient, physician and ancillary service claims linked by the medical claims NPI number and place of service code. Additionally, to further determine provider hospital affiliation the clinician must have provided services to at least three patients on three different dates in the last 12 months. John Marks is affiliated with the following medical facilities:

Hospital Name Address Phone Hospital Type Overall Rating
BRYN MAWR HOSPITAL130 SOUTH BRYN MAWR AVE
BRYN MAWR, PA 19010
(610) 526-3000Acute Care Hospitals
PAOLI HOSPITAL255 WEST LANCASTER AVENUE
PAOLI, PA 19301
(610) 648-1000Acute Care Hospitals
MAIN LINE HOSPITAL LANKENAU100 LANCASTER AVE
WYNNEWOOD, PA 19096
(610) 645-2000Acute Care Hospitals

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NPI NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1346212594, we treat the final digit (4) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 66. The final step is to find the difference between that total and the next multiple of ten (70 - 66 = 4).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1
1
Doubled → 2
Pos 2
3
Unchanged
Pos 3
4
Doubled → 8
Pos 4
6
Unchanged
Pos 5
2
Doubled → 4
Pos 6
1
Unchanged
Pos 7
2
Doubled → 4
Pos 8
5
Unchanged
Pos 9
9
Doubled → 18 → 1 + 8
Check
4
Target digit
Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 4 → 8 2 → 4 2 → 4 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 3 + 8 + 6 + 4 + 1 + 4 + 5 + 1 + 8 + 24 = 66

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 66 is 70. The difference is the calculated check digit.

70 - 66 = 4
This NPI is valid
The calculated check digit is 4, which matches the last digit of 1346212594.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Surgery
100 E LANCASTER AVE
WYNNEWOOD, PA 19096
Surgery
100 E LANCASTER AVE, 4404 MEDICAL SCIENCE BUILDING
WYNNEWOOD, PA 19096
Colon & Rectal Surgery
100 E LANCASTER AVE, SUITE 275 LANKENAU MED SCI BLDG.
WYNNEWOOD, PA 19096
Internal Medicine (Cardiovascular Disease)
100 E LANCASTER AVE, SUITE 356 LANKENAU MOB EAST
WYNNEWOOD, PA 19096
Internal Medicine (Cardiovascular Disease)
100 E LANCASTER AVE, STE 356EAST
WYNNEWOOD, PA 19096
Ophthalmology
100 E LANCASTER AVE, SUITE 256 MEDICAL BLDG EAST
WYNNEWOOD, PA 19096
Ophthalmology
100 E LANCASTER AVE, SUITE 256 MEDICAL BLDG EAST
WYNNEWOOD, PA 19096
Radiology (Radiation Oncology)
100 E LANCASTER AVE
WYNNEWOOD, PA 19096
Radiology (Radiation Oncology)
100 E LANCASTER AVE
WYNNEWOOD, PA 19096
Skilled Nursing Facility
100 E LANCASTER AVE
WYNNEWOOD, PA 19096
Podiatrist
100 E LANCASTER AVE, SUITE 117
WYNNEWOOD, PA 19096
Internal Medicine (Nephrology)
100 E LANCASTER AVE, SUITE 130 MEDICAL BUILDING WEST
WYNNEWOOD, PA 19096
Internal Medicine (Nephrology)
100 E LANCASTER AVE, SUITE 130 MEDICAL BUILDING WEST
WYNNEWOOD, PA 19096
Nurse Practitioner (Family)
100 E LANCASTER AVE, SUITE 108
WYNNEWOOD, PA 19096
Podiatrist
100 E LANCASTER AVE, STE 117
WYNNEWOOD, PA 19096
Internal Medicine (Hematology & Oncology)
100 E LANCASTER AVE, SUITE 417
WYNNEWOOD, PA 19096
Radiology (Neuroradiology)
100 E LANCASTER AVE, DEPT OF RADIOLOGY
WYNNEWOOD, PA 19096
Pathology (Anatomic Pathology & Clinical Pathology)
100 E LANCASTER AVE
WYNNEWOOD, PA 19096
Pathology (Anatomic Pathology & Clinical Pathology)
100 E LANCASTER AVE
WYNNEWOOD, PA 19096
Pathology (Anatomic Pathology & Clinical Pathology)
100 E LANCASTER AVE
WYNNEWOOD, PA 19096

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1346212594, enumerated as an "individual" on February 02, 2006.

The provider is located at 100 E LANCASTER AVE SUITE 330 LANKENAU MOB WEST WYNNEWOOD, PA 19096 and the phone number is (610) 645-9093.

Colon & Rectal Surgery with taxonomy code 208C00000X.

The provider might be accepting Accepts: Medicare and Medicaid. Please consult your insurance carrier or call the provider to verify.

John Marks is affiliated with: BRYN MAWR HOSPITAL, PAOLI HOSPITAL and MAIN LINE HOSPITAL LANKENAU.